Answer:
Starting with the given system of equations:
-3x + 3y = 4
-x + y = 3
To solve for y in terms of x, we can rearrange each equation to the slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept.
For the first equation, we can add 3x to both sides and divide by 3 to obtain:
3y = 3x + 4
y = x + 4/3
So the slope of the first equation is 1 and the y-intercept is 4/3.
For the second equation, we can add x to both sides to obtain:
y = x + 3
So the slope of the second equation is also 1, but the y-intercept is different at 3.
To determine the number of solutions, we can use either substitution or elimination.
Using substitution, we can solve for x in the second equation:
x = y - 3
Then substitute this expression for x in the first equation:
-3(y - 3) + 3y = 4
Simplifying, we get:
-3y + 9 + 3y = 4
9 = 4
This is a contradiction, so the system has no solution.
Alternatively, we can use elimination to solve for y:
-3x + 3y = 4
-x + y = 3
Multiplying the second equation by 3, we get:
-3x + 3y = 4
-3x + 3y = 9
Subtracting the second equation from the first, we get:
0x + 0y = -5
This is a contradiction, so the system has no solution.
In summary, the given system of equations has no solution. The two equations have the same slope but different y-intercepts.
Hope this helps you! I'm sorry if it's wrong. If you need more help, ask me! :]
Answer:
Equation 1: y = x + 4/3
Equation 2: y = x +3
No solution, same slope, different y-intercepts.
Step-by-step explanation:
The two equations have been converted to y=mx+b or slope-intercept form. The slope is the same (1), but the intercepts are different. Equation 1 crosses the y-axis at (0, 4/3), Equation 2 crosses the y-axis at (0,3). Both equations represent parallel lines, so there is no solution because they will never intersect each other.
Last week, the price of apples at a grocery store was $1.60 per pound. This week, apples at the same grocery store are on sale at a 10% discount. What is the total price of 4 1/2 pounds of apples this week at the grocery store?
A $4.77
B $6.48
C $6.75
D $6.93
Answer:
$6.48
Step-by-step explanation:
First, let's find the discount.
1.60 * 0.1 = $0.16 (the discount)
Second, subtract the discount to the original price.
1.60 - 0.16 = $1.44 (price after discount was applied)
Third, multiply to 4 1/2 to find how much it will cost.
1.44 * 4.5 = $6.48 (price of 4 1/2 pounds of apples with discount applied)
Solve the problem. Find the probability P(E C ) if P(E)=0.42 \begin{tabular}{|c|c|} \hline a & 0.29 \\ \hline b & 0.14 \\ \hline c & 0.32 \\ \hline d & 0.58 \end{tabular}
Combining events A and B results in the entire event, with a probability of 1 for the entire event. The probability P(EC)= 1-P(E) OR P(EC)= 1-0.42= 0.58 is the result.
When conducting an experiment, the probability of an event serves as a gauge for the likelihood that the event will actually occur. When there are only two possible outcomes, such as passing an exam or failing it, complementary events take place. The opposite of an event is represented by the complement.
When one event only happens if and when the other one doesn't, two events are said to be complementary. For instance, it rains or it doesn't.
The probability of an event occurring when added to the probability of the complement of that event occurring is always 1. Considering A to be an event, P(A) + P(A') = 1.
Associated events are exhausting.
Events that complement one another can never coexist.
P(EC)+P(E)=1
P(EC)= 1-P(E)
P(EC)= 1-0.42
P(EC)= 0.58.
Hence, the probability P(EC)= 0.58.
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Out of 100 problems on a test,15 problems,or 15% of the problems, have two parts. So far, you have completed 40 problems. If the two-part problems appear throughout the test, about how many of those 40 problems have two parts?
Thus, out of 40 problems, 6 problems will have two parts problems which is 15% of the 40.
Explains about the percentage:The phrase "percent" refers to a number out of 100 or per 100. The term is derived from the Roman expression per centum, which means "by the hundred." Hence, a single percent would be one of those hundred units, and one percent, for every one hundred of anything.
Given data:
Out of 100 problems - 15% have two parts.
Out of 100 problems - 85% will not have two parts.
Thus, out of 40 problems, also 15% will contain two parts.
Then,
Number of two-part problem = 15% of 40
Number of two-part problem = 15 * 40 / 100
Number of two-part problem = 600 / 100
Number of two-part problem = 6
Thus, out of 40 problems, 6 problems will have two parts which is 15% of the 40.
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Five cards are dealt from a standard deck of 52. Write down numerical expressions:(a) The probability that the third card is an ace.(b) The probability that all cards are of the same suit.(c) The probability of two or more aces.
The probability that the third card will be an ace is 0.0045, probability of all cards to be of same suit is 0.000495, and the probability of two or more aces is 0.004.
What is probability?
Probability is the study of the chances of occurrence of a result, which are obtained by the ratio between favorable cases and possible cases.
(a) The probability that the third card is an ace:
We can approach this problem by using the conditional probability formula, which states that the probability of an event A given that event B has occurred is:
P(A|B) = P(A and B) / P(B)
Let A be the event that the third card is an ace, and let B be the event that the first two cards are not aces. The probability of the first card being an ace is 4/52 (since there are four aces in a standard deck of 52 cards). The probability of the second card being an ace given that the first card was not an ace is 3/51 (since there are three aces left in the deck of 51 cards). The probability of the third card being an ace given that the first two cards were not aces is 2/50 (since there are two aces left in the deck of 50 cards).
Therefore, using the conditional probability formula, we have:
P(A|B) = P(A and B) / P(B)
P(A|B) = (4/52) * (3/51) * (2/50) / (1 - (4/52) * (3/51))
P(A|B) ≈ 0.0045
So the probability that the third card is an ace is approximately 0.0045.
(b) The probability that all cards are of the same suit:
There are four suits in a standard deck of cards: clubs, diamonds, hearts, and spades. We can compute the probability that all five cards are of the same suit as follows:
P(all cards are of the same suit) = P(first card is a particular suit) * P(second card is the same suit) * P(third card is the same suit) * P(fourth card is the same suit) * P(fifth card is the same suit)
P(all cards are of the same suit) = (13/52) * (12/51) * (11/50) * (10/49) * (9/48)
P(all cards are of the same suit) ≈ 0.000495
So the probability that all cards are of the same suit is approximately 0.000495.
(c) The probability of two or more aces:
We can compute the probability of two or more aces by considering the complementary event: the probability that there are zero or one aces in the five cards dealt. The probability of getting zero aces is:
P(zero aces) = (48/52) * (47/51) * (46/50) * (45/49) * (44/48)
P(zero aces) ≈ 0.617
The probability of getting one ace is:
P(one ace) = (4/52) * (48/51) * (47/50) * (46/49) * (45/48) * 5
P(one ace) ≈ 0.379
Therefore, the probability of two or more aces is:
P(two or more aces) = 1 - P(zero aces) - P(one ace)
P(two or more aces) ≈ 0.004
So the probability of two or more aces is approximately 0.004.
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The first four terms in a sequence are
2 5 8 11
If the 19th term in the sequence is 56.
Answer:
We can see that each term in the sequence is 3 more than the previous term. So we can find the 5th term by adding 3 to the fourth term, the 6th term by adding 3 to the 5th term, and so on.
5th term = 11 + 3 = 14
6th term = 14 + 3 = 17
7th term = 17 + 3 = 20
...
We can see that each term can be written as:
term = 2 + 3n
where n is the position of the term in the sequence starting from 0 (i.e. the first term is at position 0, the second term is at position 1, etc.)
To find the 19th term, we can substitute n = 17 into the formula:
19th term = 2 + 3(17) = 53
However, the problem states that the 19th term is actually 56. This means that we need to adjust our formula to account for any initial shift in the sequence. We can do this by subtracting a certain value from n, so that the first term in the sequence corresponds to n = 0.
Let's call this adjustment value "a". We know that when n = 0, the first term in the sequence is 2. So we can set up an equation:
2 + 3a = 2
Solving for a, we get a = 0.
Therefore, the adjusted formula for the nth term is:
term = 2 + 3(n-1)
where n is the position of the term in the sequence starting from 1.
Substituting n = 19, we get:
19th term = 2 + 3(18) = 56
So our adjusted formula is correct, and the answer is 56.
(Please could you kindly mark my answer as brainliest)
Question 1: The consumption function captures one of the key relationships in economic. It expresses consumption as a function of disposal income, where disposal income is income after taxes. The attached file "Regression Assignment - Dataset 1" shows data of average US annual consumption (in $) and disposable income (in $) for the years 2000 to 2016. 1. Find the sample linear regression equation for the model 2. In this model, the slope coefficient is called the marginal propensity to consume. Interpret its meaning 3. What is the predicted consumption if disposal income is $33,000?
Therefore , the solution of the given problem of function comes out to be $25,548.87 is the expected consumption when the available income is $33,000.
What precisely is function?The mathematics lesson covers a wide range of topics, including math, numbers, and one's subsets, as well as building, construction, and both real and fictitious geographic places. The relationships between various components that all cooperate to create the same outcome are covered by a work. A utility is composed of an assortment of unique parts that work together to produce unique outcomes for each input.
Here,
Utilizing Excel or statistical software, we can discover a sample linear regression equation. Using the regression analysis function in Excel, we obtain:
=> Consumption = -5117.41 + 0.9694 * Discretionary Income Marginal Propensity to Consume
=> (MPC): 0.9694 Regression equation
MPC interpretation: The MPC shows the percentage of extra disposable income that is spent on consumption.
The MPC in this instance is 0.9694, indicating that on average 0.9694 cents are spent on consumption for every extra dollar of disposable income.
When the available income is $33,000, we can enter the number as follows into the regression equation to determine the predicted consumption:
=> Usage = -5117.41 plus 0.9694 times 33,000.
=>Usage = $25,548,87
Therefore, $25,548.87 is the expected consumption when the available income is $33,000.
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Given the graph of the function, select the statement that describes the end behavior of the function.- Answer D is cut off sorry.
WILL GIVE BRAINLIEST
As x approaches to infinity y also approaches to infinity.
Define functionIn mathematics, a function is a relation between a set of inputs (called the domain) and a set of possible outputs (called the range) with the property that each input is related to exactly one output. Formally, a function f from a set A to a set B is defined as a subset of the Cartesian product A × B such that for every element a in A, there is a unique element b in B such that (a, b) belongs to the subset.
A function can be represented using the function notation f(x) = y, where x is the input (or independent variable), y is the output (or dependent variable), and f is the name of the function. The value of f(x) depends on the value of x and the rules of the function.
From the graph
x approaches to infinity
y also approaches to infinity.
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please help i will give 100 points
Answer:
x= 3
Step-by-step explanation:
Since triangle is equilateral...
2y = 25x - 15
And....
Here,
2y + 2y + 2y = 180
6y = 180
y = 180/6
= 30
Again,
2y = 25x -15
2*30 + 15 = 25 x
x = 75/25
= 3
Graph the solution to the following system of inequalities in the coordinate plane.
y < -2x - 4
x ≥ -3
Answer:
green is x ≥ -3
blue is y < -2x - 4
Step-by-step explanation:
Pls answerrrrr
with simple working
the answer will be -137
Your credit card charges an interest rate of 2% per month. You have a current balance of $1,000, and want to pay it off. Suppose you can afford to pay $100 per month. What will your balance be at the end of one year? You will still owe $72.97 after one year. (Round to the nearest cent.) X x That's incorrect. We want to compute the future value of our account balance. Here is the cash flow timeline over the next 12 months: Month 0 1 2 11 12 Cash flow $1,000 - $100 - $100 - $100 -$100 From the timeline we can see that we need to combine the FV of our current balance with the FV of our annuity payments of $100 per month. The FV of our current balance is: FV = PV x (1 + r)" The FV of the annuity payments is: FV=cxı((1+y)+ - 1) We can also compute this result using a spreadsheet. OK Your credit card charges an interest rate of 2% per month. You have a current balance of $1,000, and want to pay it off. Suppose you can afford to pay $100 per month. What will your balance be at the end of one year?
After calculating the future value of the current balance, You will still owe $72.97 after one year.
Calculate the future value of the current balance: FV = PV x (1 + r)
Where, FV = Future Value, PV = Present Value (the current balance of $1,000), and r = interest rate of 2% per month.
Thus, FV = 1,000 x (1 + 0.02) = 1,020
Calculate the future value of the annuity payments of $100 per month:
FV = c x ı((1 + y)+ - 1)
Where, c = $100, y = interest rate of 2% per month.
Thus, FV = 100 x ı((1 + 0.02)12 - 1) = 1,246.24
Calculate the future value of the account balance: FV = 1,020 + 1,246.24 = 2,266.24
Finally, calculate the balance at the end of one year:
Balance at the end of one year = Future Value - Annuity Payments
Thus, Balance at the end of one year = 2,266.24 - (12 x 100) = 72.97.
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A rectangle has sides of 72 cm and 36 cm. Another rectangle has sides of 4 cm and 8 cm. What is the scale ratio?
Scale ratio is 9 cm which can be calculated by comparing lengths and using division.
The scale ratio between two rectangles is a way to compare the size of their corresponding sides. It is calculated by dividing the length of one side of the first rectangle by the length of the corresponding side of the second rectangle.
In this case, let's compare the length of the longer side of the first rectangle (72 cm) with the length of the longer side of the second rectangle (8 cm):
scale ratio = 72 cm ÷ 8 cm = 9
This means that the longer side of the first rectangle is 9 times as long as the longer side of the second rectangle. We could also calculate the scale ratio using the shorter sides:
scale ratio = 36 cm ÷ 4 cm = 9
In either case, the scale ratio is 9, which tells us that the first rectangle is 9 times as large as the second rectangle. This can be useful for creating accurate scale drawings or models of objects.
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PLEASE HELP GIVING POINTS!!!!!
Answer:
its c
Step-by-step explanation:
A student looks out of a third story window and sees the top of the school flagpole at an angle of elevation of 22°. The student is 28 ft. above the ground and 60 ft from the flagpole. Find the height of the flagpole to the nearest foot.
If a student looks out of a third story window and sees the top of the school flagpole at an angle of elevation of 22°. the height of the flagpole to the nearest foot is approximately 52 ft.
How to find the height?Let's call the height of the flagpole "h". We can use the tangent function to set up an equation based on the angle of elevation:
tan(22°) = h / 60
Solving for h, we get:
h = 60 tan(22°)
h ≈ 23.7 ft
However, this value is the distance from the base of the flagpole to the top of the flagpole, and we need to find the actual height of the flagpole.
h_actual = h + 28
h_actual =23.7 + 28
h_actual = 51.7 ft
h_actual = 52 ft (Approximately)
Therefore, the height of the flagpole to the nearest foot is approximately 52 ft.
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A teacher just asked everyone to measure a segment on a worksheet. Based solely on the data, which measure of central tendency should be used based on the following measurements: 8. 3 cm, 8. 4 cm, 8. 8 cm, 8. 2 cm, 8. 3 cm, 8. 0 cm, 8. 1 cm, 8. 5 cm
The mean of the data is 8.1 cm, which is the most appropriate measure of central tendency to use in this situation.
The most appropriate measure of central tendency to use in this situation is the mean. The mean is the sum of all of the values divided by the number of values. In this case, this would be 8.1 cm (the sum of 8.3 cm, 8.4 cm, 8.8 cm, 8.2 cm, 8.3 cm, 8.0 cm, 8.1 cm, and 8.5 cm divided by 8).
The formula for mean is as follows:
Mean = Sum of values / Number of values
In this situation, the sum of values is 8.3 cm + 8.4 cm + 8.8 cm + 8.2 cm + 8.3 cm + 8.0 cm + 8.1 cm + 8.5 cm = 67.7 cm
Number of values = 8
Mean = 67.7 cm / 8 = 8.1 cm
The mean is the best measure of central tendency to use in this situation because it is the most accurate representation of the data, as it takes into account all of the values in the dataset.
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Use the CER strategy to solve the following questions.
1. As an accountant, you keep track of invoices and payments. You received a payment of
$4, 823.28 from a client. Your company's money transfer provider charges a fee that
reduces the amount paid by 1 %. To match the amount you received to the invoice, you
need to know the original amount the client paid before the transfer fee was charged.
What was the original amount the client paid?
Answer:
48,232.8
Step-by-step explanation:
4,823.28 x 0.01
A book has 50 more pages than nother book. If the total number of pages in both books is 400, how many pages does the larger book have?
Answer:
450
Step-by-step explanation:
larger book= 400+50
=450
What is the missing reason in step 8? statements reasons 1. circle m with inscribed ∠kjl and congruent radii jm and ml 1. given 2. △jml is isosceles 2. isos. △s have two congruent sides 3. m∠mjl = m∠mlj 3. base ∠s of isos. △are ≅ and have = measures 4. m∠mjl m∠mlj = 2(m∠mjl) 4. substitution property 5. m∠kml = m∠mjl m∠mlj 5. measure of ext. ∠ equals sum of measures of remote int. ∠s of a △ 6. m∠kml =2(m∠mjl) 6. substitution property 7. measure of arc k l = measure of angle k m l 7. central ∠ of △ and intercepted arc have same measure 8. measure of arc k l = 2 (measure of angle m j l) 8. ? 9. one-half (measure of arc k l) = measure of angle m j l 9. multiplication property of equality reflexive property substitution property base angles theorem second corollary to the inscribed angles theorem
The answer fοr this is Substitutiοn Prοperty
What is Substitutiοn Prοperty?
The substitutiοn prοperty is a cοncept in algebra that is used tο substitute the value οf a given variable οr a quantity intο an expressiοn tο find the value οf the unknοwn. In simple wοrds, we can say that the substitutiοn prοperty is used tο replace the value οf a quantity in an equatiοn οr an expressiοn tο sοlve a mathematical prοblem. We will discuss the meaning οf the substitutiοn prοperty οf equality, the substitutiοn prοperty in geοmetry, and the direct substitutiοn prοperty in limits in the fοllοwing sectiοns.
Substitutiοn Prοperty is cοnsidered as οne οf the mοst intuitive οf the mathematical prοperties that yοu'll prοbably encοunter. Yοu may have been using substitutiοn withοut even knοwing it. This prοperty says that if x=y, then in any true equatiοn invοlving y, yοu can replace y with x, and yet yοu'll still have a true equatiοn.
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Take a loοk at the attached example shοwn below.
(
6. 25
x
+
12
)
−
(
4. 25
x
−
7
)
(
6. 2
5
+
1
2
)
−
(
4. 2
5
−
7
)
The expression (6.25x + 12) - (4.25x - 7) / (6.25 + 12) - (4.25 - 7) to its simplest form, which is (2x + 19) / 21.
To simplify the given expression, we need to apply the order of operations, which is Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).
First, we will simplify the expression inside the parentheses using the distributive property.
(6.25x + 12) - (4.25x - 7) = 6.25x + 12 - 4.25x + 7
Next, we will combine like terms, which are the terms with the same variable and exponent.
6.25x - 4.25x = 2x
12 + 7 = 19
Therefore, the simplified expression becomes:
2x + 19
Now, we will simplify the expression in the denominator.
(6.25 + 12) - (4.25 - 7) = 18.25 - (-2.75)
Remember that subtracting a negative number is the same as adding a positive number.
18.25 + 2.75 = 21
Finally, we can write the simplified expression as:
(2x + 19) / 21
This is the simplest form of the given expression, and it cannot be further simplified.
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Complete Question:
Simplify the expression: ( 6. 25 x + 12 ) − ( 4. 25 x − 7 ) ( 6. 2 5 + 1 2 ) − ( 4. 2 5 − 7 )
The price of a latte dropped from $3.50 to $3.02. Find the absolute change and relative change of the price
of a latte.
Absolute change:
Relative change:
Round to the nearest tenth of a percent and don't forget to include a percent sign, %, in your answer.
For the latte, the values are obtained as -
Absolute change - $0.48
Relative change - 13.7%
What is absolute change?
Absolute change tells us the magnitude of the difference or change between two values, regardless of whether the change was an increase or a decrease. It is often used in economics, finance, and other fields to measure changes in variables such as prices, income, sales, or quantities.
The absolute change in the price of a latte is the difference between the original price and the new price, without regard to the direction of the change.
Absolute change = | New price - Original price |
Absolute change = | $3.02 - $3.50 |
Absolute change = $0.48
The relative change in the price of a latte is the absolute change expressed as a percentage of the original price.
Relative change = (Absolute change / Original price) x 100%
Relative change = ($0.48 / $3.50) x 100%
Relative change = 13.7%
Therefore, the absolute change in the price of a latte is $0.48, and the relative change is 13.7%.
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A point is randomly selected on the surface of a lake that has a maximum depth of 100 feet. Let y be the depth of the lake at the randomly chosen point.
(a) What are possible values of y?
all positive integers from 0 to 100
all real numbers from 1 to 100
all positive integers from 1 to 100
all real numbers from 0 to 100
The probability of y that when a point is randomly selected on the surface of a lake that has a maximum depth of 100 feet are all real numbers from 0 to 100.
A lake is a body of freshwater that is surrounded by land. The water in a lake is still, unlike a river or a stream, which flows from one place to another. Lakes are a vital component of the water cycle and play an important role in the ecosystem.
Since the maximum depth of the lake is 100 feet, the depth of the lake at the randomly chosen point cannot be greater than 100 feet. Therefore, y can have any value between 0 and 100. As a result, all real numbers from 0 to 100 are possible values of y.
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Bert is at the bakery. He is looking at different types of cakes. He sees one that serves 2 and costs $4.50, another serves 8 and costs $10.00, and another cake that serves 10 and costs $20.00. Which cake is the most expensive per serving?
Answer:
To find out which cake is the most expensive per serving, we need to calculate the cost per serving for each cake.
The first cake serves 2 people and costs $4.50. So the cost per serving is:
$4.50 ÷ 2 = $2.25 per serving
The second cake serves 8 people and costs $10.00. So the cost per serving is:
$10.00 ÷ 8 = $1.25 per serving
The third cake serves 10 people and costs $20.00. So the cost per serving is:
$20.00 ÷ 10 = $2.00 per serving
Therefore, the first cake is the most expensive per serving, at $2.25 per serving.
Cola makers test new recipes for loss of sweetness during storage. Trained tasters rate the sweetness before and after
storage. Here are the sweetness losses (sweetness before storage minus sweetness after storage) found by 10 tasters
for one new cola recipe:
2. 0,0. 4,0. 7, 2. 0-0. 4 2. 2-1. 3 1. 2 1. 12. 3
Are these data good evidence that the cola lost sweetness? Use the four-step process and use a significance level of
5%. Assume the data is taken from a normal distribution.
The null hypothesis was rejected as the mean of the sweetness losses was greater than the critical value. Thus, the cola did lose sweetness.
1. State the null hypothesis: The null hypothesis is that the cola did not lose sweetness.
2. Determine the level of significance: The level of significance is 5%.
3. Calculate the test statistic and The test statistic is calculated by subtracting the mean of the sweetness losses from zero.
4. Make a decision: If the test statistic is greater than the a critical value, then the null hypothesis should be rejected and the cola did lose sweetness. which is greater than the a critical value of 0.05. Therefore, the null hypothesis should be rejected and the cola did indeed lose sweetness.
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If Chandler uses 3 gigabytes of data this
month, how much will his cell phone bill be?
Father's age is five times than the son's age. If the sum of their ages is 60 years, find their present ages.
Father : 50 years old
Son : 10 years old
zoe the goat is tied by a rope to one corner of a 15 meter-by-25 meter rectangular barn in the middle of a large, grassy field. over what area of the field can zoe grace of the rope is:
If Zoe the goat is tied to a corner of a rectangular barn measuring 15m by 25m in the middle of a field, Zoe can graze within an area of 2660.5 sqm.
The area of the field that Zoe can graze depends on the length of the rope, which is not given in the problem. However, we can use the Pythagorean theorem to find the length of the diagonal of the barn, which represents the maximum length of the rope.
The diagonal of a rectangle with sides of length 15 meters and 25 meters can be found using the Pythagorean theorem:
diagonal² = 15² + 25²
diagonal² = 225 + 625
diagonal² = 850
diagonal =[tex]\sqrt{850}[/tex] ≈ 29.15 meters
This means that the maximum length of the rope is about 29.15 meters. The area that Zoe can graze is a circle with radius equal to the length of the rope. We can use the formula for the area of a circle to find this area:
Area = π(radius)²
Area = π(29.15)²
Area ≈ 2660.5 square meters
Therefore, the correct answer is approximately 2660.5 square meters
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Which one of the following graphs represents the solution of the inequality −3x+16≥−2
?
Answer:
B
Step-by-step explanation:
the answer is B please see on the attached.
Assume X is normally distributed with a mean of 10 and a standard deviation of 2. Determine the value for x that solves each of the following:
(a) P(X > x) = 0.5
(b) P(X > x) = 0.95
(c) P(x < X < 10) = 0.2
(d) P(-x < X - 10 < x) = 0.95
(e) P(-x < X - 10 < x) = 0.99
The values of 'x' that solve for given conditions are (a) 11.349 (b) 13.29 (c) 7.44 and 12.56 (d) 6.08 and 13.92 (e) 5.84 and 14.16.
The formula for z-score:The z-score, also known as the standard score, is a measure of how many standard deviations a data point is away from the mean of its distribution.
The formula for calculating the z-score of a data point x, with mean μ and standard deviation σ, is:
z = (x - μ) / σwhere z is the z-score.
Here we have
X is normally distributed with a mean of 10 and a standard deviation of 2
As we know z score, z = (x - μ) / σ.
=> x = μ + zσ
Hence, to find the 'x' value we need to know the value of the z score in each situation
(a) P(X > x) = 0.5
The z-score corresponding to a right-tail probability of 0.5 is 0.6745.
=> x = 10 + 0.6745 * 2
=> x = 11.349
(b) P(X > x) = 0.95
The z-score corresponding to a right-tail probability of 0.05 is 1.645.
Substituting the given values into the formula, we get:
x = 10 + 1.645 * 2
x = 13.29
(c) P(x < X < 10) = 0.2
The z-score corresponding to a left-tail probability of 0.1 is -1.28 and the z-score corresponding to a right-tail probability of 0.1 is 1.28.
From formula, z = (x - μ) / σ
=> -1.28 = (x - 10) / 2
=> x = 7.44
and
=> 1.28 = (x - 10) / 2
=> x = 12.56
Therefore,
The values of x that solve P(x < X < 10) = 0.2 are 7.44 and 12.56.
(d) P(-x < X - 10 < x) = 0.95
The z-score corresponding to a right-tail probability of 0.025 is 1.96.
=> -1.96 = (-x - 10) / 2
=> x = 6.08
and
=> 1.96 = (x - 10) / 2
=> x = 13.92
Therefore,
The values of x that solve P(-x < X - 10 < x) = 0.95 are 6.08 and 13.92.
(e) P(-x < X - 10 < x) = 0.99
The z-score corresponding to a right-tail probability of 0.005 is 2.58.
=> -2.58 = (-x - 10) / 2
=> x = 5.84
and
=> 2.58 = (x - 10) / 2
=> x = 14.16
Therefore,
The values of x that solve P(-x < X - 10 < x) = 0.99 are 5.84 and 14.16.
Therefore,
The values of 'x' that solve for given conditions are (a) 11.349 (b) 13.29 (c) 7.44 and 12.56 (d) 6.08 and 13.92 (e) 5.84 and 14.16.
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You open a restaurant with two other people. While the business is launching, you agree to divide all costs equally. You need to purchase a commercial stove. One store sells the stove for $2,499, including tax, plus a $291 delivery fee. A second store sells the same stove for $2,628, including tax, plus a $138 delivery fee. You choose to purchase the stove from the store that offers the better deal. After splitting the total cost equally, what is your portion of the cost?
The tοtal cοst frοm the first stοre is: $2,499 + $291 = $2,790
Explain what algebra is.In the field οf mathematics knοwn as algebra, abstract symbοls rather than cοncrete numbers are subjected tο arithmetic οperatiοns and οther fοrmal manipulatiοns.
The area οf mathematics knοwn as geοmetry studies hοw οbjects are shaped as well as hοw they relate tο οne anοther and the physical characteristics οf the space they οccupy.
The tοtal cοst frοm the secοnd stοre is:
$2,628 + $138 = $2,766
Therefοre, the stοve is cheaper at the secοnd stοre. The tοtal cοst, including splitting the cοst equally between the three οwners, is:
($2,766 / 3) = $922
Each οwner's pοrtiοn οf the cοst is:
$922 / 3 = $307.33
Therefore, your portion of the cost is $307.33.
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2- Membership in a digital library has a $5 startup fee and then costs $9.95 per month. Membership in a video streaming service costs $7.99 per month with no startup fee. Use vocabulary words to explain how this information could be used to write an expression for the total cost of both memberships after m months
Answer:
To write an expression for the total cost of both memberships after m months, we can use the following vocabulary words:
- Startup fee: a one-time fee charged at the beginning of a service or membership
- Monthly fee: a recurring fee charged every month for a service or membership
Using this information, we can write the expression as:
Total cost = (Startup fee for digital library) + (Monthly fee for digital library x number of months) + (Monthly fee for video streaming service x number of months)
Substituting the given values, we get:
Total cost = (5) + (9.95 x m) + (7.99 x m)
Simplifying the expression, we get:
Total cost = 5 + 17.94m
Therefore, the total cost of both memberships after m months can be expressed as 5 + 17.94m.