a) the electric oven takes longer to cook the meat than the microwave oven, and that the difference in cooking times will increase with larger weights.
b)a joint of meat that takes about 2 hours to cook in an electric oven weighs approximately 1.29 kg.
c) The answer to part a seems sensible, as the formula for the electric oven predicts longer cooking times than the formula for the microwave oven.
Define equationThe definition of an equation is the claim that two expressions are equal. It consists of two sides, the left-hand side (LHS) and the right-hand side (RHS), separated by an equal sign (=). The LHS and RHS can contain variables, constants, operations, and functions.
a) The two formulae for cooking times are:
(66 x weight in kg) + (35 x time in an electric oven
Microwave oven time = (26 x weight in kg) + 15
We can compare the two formulae by looking at their coefficients and constants. This suggests that the electric oven takes longer to cook the meat than the microwave oven, and that the difference in cooking times will increase with larger weights.
b) (66 x weight in kg) + (35 x time in an electric oven
2 x 60 = (66 x weight in kg) + 35
120 - 35 = 66 x weight in kg
85 = 66 x weight in kg
weight in kg = 85 / 66
weight in kg ≈ 1.29
So, a joint of meat that takes about 2 hours to cook in an electric oven weighs approximately 1.29 kg.
Microwave oven time = (26 x weight in kg) + 15
Microwave oven time = (26 x 1.29) + 15
Microwave oven time ≈ 48.34 minutes
Therefore, a 1.29 kg joint of meat would take about 48 minutes to cook in a microwave oven.
c) The answer to part a seems sensible, as the formula for the electric oven predicts longer cooking times than the formula for the microwave oven.
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Mrs Thomas has a bag of cookies that are four different flavors. Which method which method of testing would most likely lead to an experimental probability of randomly selecting a sugar cookie that is the closest to the theoretical probability of randomly selecting a sugar cookie?
Click on the image to see the answers
Answer:
The highest number of trials would most likely lead to an experimental probability of randomly selecting a sugar cookie that is closest to the theoretical probability of randomly selecting a sugar cookie. Therefore, option C, which suggests conducting one experiment with 500 trials, would be the most appropriate method of testing.
With 500 trials, there would be a large enough sample size to reduce the impact of random variations and increase the accuracy of the results. This would allow us to obtain a more reliable estimate of the experimental probability, which would be closer to the theoretical probability of selecting a sugar cookie.
Options A and D involve a small number of trials, which may not provide sufficient data for accurate estimations. Option B involves a large number of experiments with a small number of trials, which may not capture the overall probability of selecting a sugar cookie across all experiments. Therefore, option C is the best choice for obtaining a reliable estimate of the experimental probability.
(Please could you kindly mark my answer as brainliest you could also follow me so that you could easily reach out to me for any other questions)
Last night, while on patrol, Agent 008 came upon a spaceship! He hid behind a tree and watched a group of little space
creatures carry all sorts of equipment out of the ship. But suddenly, he sneezed. The creatures jumped back into their
ship and sped off into the night. 008 noticed that they had dropped something, so he went to pick it up. It was a
calculator! What a great find. He noticed that it had a LOG button, but he noticed something interesting: log 10 did
not equal 1! With this calculator, log 10≈ 0.926628408. He tried some more: log 100≈ 1.853256816 and
log 1000 2.779885224.
a. What base do the space creatures work in? Explain how you can tell.
b. How many fingers do you think the space creatures have?
(A) The basis in which the space work is done is around 2. The powers of 10's logarithmic values can be used to determine this. (b) They could have two fingers for each hand, giving infants a total of five fingers.
What is the purpose of logarithmic?a. The space creatures are most likely employed in a base other than base 10. The values of log 10, log 100, and log 1000 do not match the expected values for base 10, which should be 1, 2, and 3, respectively. Instead, the values given indicate that the base is slightly less than ten, because log 10 is less than one, log 100 is less than two, and log 1000 is less than three.
To be more specific, using the calculator's approximation, we can use the change of base formula to find the value of log base b for each of these numbers:
log base b of 10 = log 10 / log b ≈ 0.926628408
log base b of 100 = log 100 / log b ≈ 1.853256816
log base b of 1000 = log 1000 / log b ≈ 2.779885224
By dividing the known values of log 10, log 100, and log 1000, we can find log b:
0.473606797 log b = log 1000 / log 100
As a result, the space creatures are most likely based on 9.526.
b. It is impossible to determine how many fingers the space creatures have based solely on the calculator information and logarithm values. The space creatures' base could be related to the number of fingers they have, but we don't have enough information to tell.
The inverses of exponential functions, or those that "undo," the exponential functions, are the logarithmic functions.
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(-2,-9), m= -7/5 write an equation in point slope form for the line that passes through each point with the given slope, then graph the equation.
The line passes through the two points (-2,-9) and (3,-16).
We can write an equation in point-slope form using the following formula for the line passing through the point (-2,-9) and having a slope of m = -7/5:
y - y1 = m(x - x1)
where m is the slope of the line and (x1,y1) is the line's point.
Inputting the values provided yields:
y - (-9) = (-7/5)(x - (-2))
Simplifying:
y + 9 = (-7/5)(x + 2)
To get rid of the fraction, multiply both sides by 5. This gives us:
5y + 45 = -7(x + 2)
As we enlarge and rearrange, we obtain:
7x + 5y + 59 = 0
This is the line's standard form equation.
We can locate two points on the line and plot them to create a graph of the line. We can utilise the y-intercept, which is obtained by solving for y while setting x=0 in the equation:
7(0) + 5y + 59 = 0
5y = -59
y = -59/5
The y-intercept is therefore (0,-59/5). Using the slope, we may also locate a different point on the line:
m = -7/5
Beginning at (-2,-9), we can travel 7 units left and 5 units right to reach a different point:
(-2+5, -9-7) = (3, -16) (3, -16)
Hence, the line traverses both of the following two points: (3,-16).
Here is the line's graph:
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The answer is:
[tex]\sf{y+9=-\dfrac{7}{5}(x+2)}[/tex]
Work/explanation:
We need to determine the line's equation. I will begin by writing the equation in point slope form:
[tex]\mapsto\phantom{333}\sf{y-y_1=m(x-x_1)}[/tex]
where m = slope and (x₁,y₁) is the point
Plug in the data:
[tex]\sf{y-(-9)=-\dfrac{7}{5}(x-(-2)}[/tex]
Simplify
[tex]\sf{y+9=-\dfrac{7}{5}(x+2)}[/tex]
Hence, this is the equation.A 3-gallon container of laundry detergent costs $53.76. What is the price per cup?
A bag of peanuts could be divided among 8 children, 9 children, or 10 children with each getting the same number, and with 2 peanuts left over in each case. What is the smallest number of peanuts that could be in the bag?
A bag of peanuts could be divided among 8 children, 9 children, or 10 children with each getting the same number, and with 2 peanuts left over in each case. The smallest number of peanuts that could be in the bag is 26.
This is because 8 children could each get 3 peanuts and there would be 2 peanuts left over, 9 children could each get 2 peanuts and there would be 2 peanuts left over, and 10 children could each get 2 peanuts and there would be 2 peanuts left over.
Small number means a number that is insufficiently large to be statistically significant, as determined by the department. Counting numerals are included in whole numbers as well. Whole numbers begin at zero. As a result, the least whole number is 0. Even though zero has no value, it is employed as a placeholder.
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PLEASE HELP!! I NEED HELP
Velocity is given by the change in the distance divided by the change in the time, hence the following equation is built to model the relationship between these three variables:
v = d/t.
The parameters for the trip are given as follows:
Distance of 230 miles.Time of 7 hours.Hence the velocity is obtained as follows:
230/7 = 32.86 miles per hour.
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NO EXPLANATION JUST ANSWER!
The volume of the given cube is 8,000 cubic units if the surface area is 2,400.
What is volume?Let's first find the length of one side of the cube using the given surface area.
The surface area of a cube is given by the formula 6s², where s is the length of one side of the cube.
We are given that the surface area of the cube is 2,400. Therefore, we can set up the following equation:
6s² = 2,400
Dividing both sides by 6, we get:
s² = 400
let's see the square root of both sides, we get:
s = 20
So, the length of one side of the cube is 20.
Now, we can find the volume of the cube using the formula V = s³:
V = 20³ = 8,000
Then, the volume of the cube is 8,000 cubic units.
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Fill in the blank question.
ASSESS REASONABLENESS In △PQR, the length of PQ⎯⎯⎯⎯⎯ is 16 units. A series of midsegments are drawn such that ST⎯⎯⎯⎯⎯ is the midsegment of △PQR, UV⎯⎯⎯⎯⎯⎯ is the midsegment of △STR, and WX⎯⎯⎯⎯⎯⎯ is the midsegment of △UVR
The length of PQ is 16 units. ST is the midsegment of PQR, UV is the midsegment of STR, and WX is the midsegment of UVR. It is reasonable to assume that the three midsegments have equal lengths since they are part of the same triangle.
In a triangle, the midsegment is a line segment that connects the midpoints of two sides of the triangle and is parallel to the third side. In the given triangle PQR, the length of PQ is 16 units. ST is the midsegment of PQR, UV is the midsegment of STR, and WX is the midsegment of UVR. Since all the midsegments are part of the same triangle, it is reasonable to assume that they have equal lengths. The triangle midsegment theorem, which asserts that the length of a triangle's midsegment is equal to half of the length of the third side of the triangle, may be used to demonstrate this.. In this case, the length of ST, UV, and WX would all be equal to 8 units, since the third side of each triangle is 16 units. This indicates that it is reasonable to assume that the midsegments of the triangle have equal lengths.
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Which value represents a percentage between 11% and 17%?
F. 0.159
G. 0.013
H. 11/1,000
J. 6/100
Therefore , the solution of the given problem of percentage comes out to be F. 0.159.
Percentage : What is it?A% is a figure or integer that in statistics is shown as a percentage of 100. Additionally, the words "pct.," "pct.," and "pc" are rarely used. But even so, the "%" indicator is commonly used to denote it. There are no dimensions; the percentage total is flat. Percentages are really just numbers because the numerator is always 100. To indicate that a number is a percentage, either the percent mark (%) or the phrase "percent" must appear before the number.
Here,
Divide by 100 to transform a percentage to a decimal. Therefore, we must locate a decimal between 0.11 and 0.17 in order to determine the figure that corresponds to a percentage between 11% and 17%.
The choices are as follows:
=> F. 0.159
=> G. 0.013
=> H. 11/1,000
=> J. 6/100
The decimal 0.159 falls within this range (0.11 to 0.17), so the solution is F. 0.159.
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Minimo común multiple de 18 30 42
Answer: El mínimo común múltiplo de 18, 30 y 42 es 630.
Step-by-step explanation:
j
Answer:
630. yes yes yyesss
4)
A basket contains four types of fruits. Cherries, Bananas, Green apples and water melons.
What is the proportion of
a) Cherries? b) green apples?
b) Ratio of water melons to bananas?
The proportion of green apples can be estimated in the same way: expressions Green apple proportion = (number of green apples) / (Total number of fruits)
what is expression ?In mathematics, you can multiply, divide, add, or subtract. An expression is formed as follows: Expression, number, and math operator Numbers, parameters, and functions make up a mathematical expression. It is possible to contrast phrases and expressions. Every mathematical statement that contains variables, numbers, and a mathematical action between them is referred to as an expression. For example, the phrase 4m + 5 is made up of the phrases 4m and 5, as well as the variable m from the provided equation, all separated by the mathematical sign +.
a) Because the basket contains four different types of fruits, the proportion of cherries can be computed as follows:
Cherry proportion = (number of cherries) / (Total number of fruits)
We can't compute the proportion of cherries without knowing how many fruits are in the basket.
b) The proportion of green apples can be estimated in the same way:
Green apple proportion = (number of green apples) / (Total number of fruits)
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The number of eggs laid per year by a particular breed of chicken is normally distributed with a mean of 225
and a standard deviation of 10 eggs
There is a 9.1% chance that a chicken of this particular breed will lay 248 eggs in a year.
A normal distribution is a continuous probability distribution described by its mean (μ) and standard deviation (σ). The formula for a normal distribution is:
[tex]P(x) = (1/σ√2π) e^(-(x-μ)^2/2σ^2)[/tex]
In this case, the mean (μ) is 225 and the standard deviation (σ) is 10.
To calculate the probability of a specific number of eggs being laid, we plug the mean and standard deviation into the normal distribution formula. For example, to calculate the probability of a chicken laying 248 eggs:
P(248) = 0.091
This means that there is a 9.1% chance that a chicken of this breed will lay 248 eggs in a year.
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Simplify this expression
Show you work using the CER strategy.
4(8x + 1)-6(1-8x)
Given:
AC‾ \overline{AC}
AC
and
BD‾\overline{BD}
BD
bisect each other.
Prove:
△BEC≅△DEA\triangle BEC \cong \triangle DEA
△BEC≅△DEA.
As a result of angle-angle-side (AAS) alignment, we have ABO, DBO, and AEO, CEO.
To prove △BEC≅△DEA:
First, we can see that segment AC and segment BD intersect at point O, which is the point of intersection of the angle bisectors of △BED.
Since AC and BD are angle bisectors, they are perpendicular bisectors of each other, so they divide the angles of △BED into congruent angles.
This means that angle ABO is congruent to angle DBO, and angle AEO is congruent to angle CEO.
Since angle ABO and angle AEO are vertical angles, they are congruent.
Similarly, angle DBO and angle CEO are vertical angles, so they are congruent.
Therefore, we have △ABO≅△DBO and △AEO≅△CEO by angle-angle-side (AAS) congruence.
Since BE is common to both triangles, we can conclude that △BEC≅△DEA by side-angle-side (SAS) congruence.
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Which algebraic expression is equivalent to the expression below? 6(9 + 5x) + 14 A. 30x - 68 B. 30x + 68 C. 30x + 40 D. 5x + 68
Answer:
[tex]30x +68[/tex]
Step-by-step explanation:
[tex]6(9+5x)+14[/tex]
[tex]\text{Distribute the 6}[/tex]
[tex]30x +68[/tex]
Line A (y= 2x+4) is transformed into Line B(y=x-9) Which best describes the new slope and y-intercept?
The slope is __ and the line is shifted ___
complete the blanks
The line is 13 units to the right (or shifted by -13 units).
What is an equation?A mathematical statement known as an equation consists of two algebraic expressions separated by equal signs (=) on either side.
It demonstrates the equality of the relationship between the printed statements on the left and right.
Left side equals right side in all formulas.
To find the values of unknowable variables, which stand in for unknowable quantities, you can solve equations.
A statement is not an equation if it lacks the equals sign.
When two expressions have the same value, a mathematical statement known as an equation will include the symbol "equal to" between them.
According to our question-
The ratio of y to x, which indicates how many units change in y when a specific number of units change in x, is used to express a line's slope.
A has a slope of 2 (x factor) = 2/1.
and as a result, y moves 2 units while x moves 1 unit.
B has a slope of 1 = 1/1.
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I need to know how to find the x,y, and z
Answer:
x =~ 31.2
y =~ 18
z =~ 9
Step-by-step explanation:
cos 30º = 27 / x
0.8660 = 27 / x
x = 27 / 0.8660
x =~ 31.18
w = height (smaller trinagle w, y, z)
tg 30º = w / 27
0.5774 = w / 27
w = 27 * 0.5774
w = 15.5898
tg 30º = z / 15.5898
0.5774 = z / 15.5898
z = 0.5774 * 15.5898
z = 9.00155052
cos 30º = 15.5898 / y
0.8660 = 15.5898 / y
y = 15.5898 / 0.8660
y =~ 18
try
(x
-2y = 16)
(- 6x +5y =-26)
x
-2y = 16
-6x +5y = -26
=
0 |xo|y=
Answer: I belive the answer is 0lxoly+39.56
Step-by-step explanation:
SIKE
Suppose the credit limit on your credit card is $4,930. What is the largest balance you should carry on this card to maintain an acceptable ratio?
A.$2,807.25
B.$2,462.50
C.$2,119.90
D.$2,117.75
Therefore, the largest balance we should carry on this card to maintain an acceptable ratio is $2,117.75, which is option D.
The ratio's calculation method.By typically dividing two figures, ratios contrast them. If you were comparing one data point (A) to another data point, your formula would be A/B. (B). You are multiplying information A by information B, as indicated by this.
To maintain an acceptable credit utilization ratio, it is generally recommended to keep the balance on a credit card below 30% of the credit limit. In this case, the credit limit is $4,930, so we should aim to keep the balance below 30% of $4,930, which is:
0.3 * $4,930 = $1,479
Therefore, the largest balance we should carry on this card is $1,479.
None of the answer choices match this amount exactly, so we can calculate the ratio of each option to the credit limit to see which one is closest to 30%.
A. $2,807.25 / $4,930 ≈ 0.570 --> Not acceptable
B. $2,462.50 / $4,930 ≈ 0.500 --> Not acceptable
C. $2,119.90 / $4,930 ≈ 0.430 --> Not acceptable
D. $2,117.75 / $4,930 ≈ 0.429 --> Acceptable
Therefore, the largest balance we should carry on this card to maintain an acceptable ratio is $2,117.75, which is option D.
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Estimate the equation gift 5 b0 1 b1mailsyear 1 b2giftlast 1 b3propresp 1 u by ols and report the results in the usual way, including the sample size and r-squared. How does the r-squared compare with that from the simple regression that omits giftlast and propresp?
The OLS regression results for the equation including gift, mails/year, giftlast and propresp are reported as including a sample size and r-squared value. The r-squared value is higher than that from the simple regression that omits giftlast and propresp.
The estimation of the equation gift 5 b0 1 b1mailsyear 1 b2giftlast 1 b3propresp 1 u by ols is done to assess the effect of various factors on the gift amount. The OLS regression results for the equation include the sample size and r-squared value. The sample size indicates the number of observations used in the estimation and the r-squared value indicates the goodness-of-fit of the model. A higher r-squared value indicates a better fit. In this case, the r-squared value of the equation with all four factors is higher than that of the simple regression model that omits giftlast and propresp. This implies that the addition of the two additional factors has improved the prediction accuracy of the model. The results of the regression should be interpreted with caution, as the addition of more variables may lead to overfitting of the data.
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Select the correct answer. what is the approximate distance between points t and u? round your answer to the nearest hundredth. a. 2.66 units b. 3 units c. 3.16 units d. 4 units
The approximate distance between points T and U is 3.16 units, rounded to the nearest hundredth.(option c)
The problem states that we need to find the approximate distance between points T and U, rounded to the nearest hundredth. To solve this problem, we can use the distance formula, which is derived from the Pythagorean theorem. The formula is given as:
distance = √[(x₂ - x₁)² + (y₂ - y₁)²]
Here, (x₁, y₁) and (x₂, y₂) represent the coordinates of the two points, and √ denotes the square root operation.
Now, let's apply this formula to find the distance between points T and U. Suppose that T has the coordinates (-2, 1), and U has the coordinates (-1, 4). Then, we can plug in these values into the formula and simplify:
distance = √[(-1 + 2)² + (4 - 1)²]
= √[(1)² + 3²]
= √(1 + 9)
= √10
≈ 3.16
Therefore, we can see that the correct answer is (c) 3.16 units.
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A certain hospitalization policy pays a cash benefit for up to five days in the hospital. It pays $250 per day for the first three days and $150 per day for the next two. The number of days of hospitalization, X, is a discrete random variable with probability function P(X = k) = t (6 – k) for k = 1, 2, 3, 4, 5. Find Var(X)
The variance of the discrete random variable X is equal to 70t.
The variance of discrete random variable X is given by Var(X) = E[X2] – (E[X])2. In this case, the probability function is given as P(X = k) = t (6 – k) for k = 1, 2, 3, 4, 5. Therefore, the expected value of X is the sum of the products of each possible value of X and its corresponding probability. This can be calculated as:
E[X] = 1 x P(X = 1) + 2 x P(X = 2) + 3 x P(X = 3) + 4 x P(X = 4) + 5 x P(X = 5)
E[X] = t (6 - 1) + 2t (6 - 2) + 3t (6 - 3) + 4t (6 - 4) + 5t (6 - 5)
E[X] = t (5) + 2t (4) + 3t (3) + 4t (2) + 5t (1)
E[X] = 5t + 8t + 9t + 8t + 5t
E[X] = 35t
The expected value of X2 is the sum of the products of each possible value of X and its corresponding probability, multiplied by X2. This can be calculated as:
E[X2] = 1 x P(X = 1) x (1)2 + 2 x P(X = 2) x (2)2 + 3 x P(X = 3) x (3)2 + 4 x P(X = 4) x (4)2 + 5 x P(X = 5) x (5)2
E[X2] = t (6 - 1) x (1)2 + 2t (6 - 2) x (2)2 + 3t (6 - 3) x (3)2 + 4t (6 - 4) x (4)2 + 5t (6 - 5) x (5)2
E[X2] = t (5) x (1)2 + 2t (4) x (2)2 + 3t (3) x (3)2 + 4t (2) x (4)2 + 5t (1) x (5)2
E[X2] = 5t + 16t + 27t + 32t + 25t
E[X2] = 105t
Therefore, the variance of X is given by Var(X) = E[X2] – (E[X])2 = 105t – (35t)2 = 70t.
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lighthouse sits at the edge of a cliff, as shown. A ship at sea level is 825 meters from the base of the cliff. The angle of elevation from sea level to the base of
he lighthouse is 37.2". The angle of elevation from sea level to the top of the lighthouse is 38.3°. Find the height of the lighthouse from the top of the cliff.
Do not round any intermediate computations. Round your answer to the nearest tenth.
Note that the figure below is not drawn to scale.
The height of the lighthouse from the top of the cliff is given as 25.3 cm
How to solve for the heighttan 37.2 = h / 825
h = 825 * 0.7590
h = 626.209
tan 38.3 = 626.209 + a / 825
825 tan 38.3 = 626.209 + a
651.55 = 626.209 + a
a = 651.55 - 626.209
a = 25 . 33 meters
Hence we can say that the height of the lighthouse from the top of the cliff is given as 25 . 33 meters
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Painters painted half of a wall yellow, their boss told them it was supposed to be painted red, they waited for it to dry and then started covering the yellow with red. At the end of the day, 5/6 of the yellow was painted red, how much of the whole wall had been painted red.
Answer: 1/6
Step-by-step explanation:
1/1 - 5/6
2 6-5/6
2 1/6
Graph the data in the table. Decide whether the graph is linear or nonlinear.
The given points of the graph represent a nonlinear relationship.
Define the term linear graph?A linear graph is a type of graph where the points plotted create a straight line when connected. The slope of a linear graph indicates how steep the line is, while the y-intercept indicates the point where the line crosses the y-axis.
If the given points (1,1), (2,2), (3,6), (4,24) form a linear or nonlinear relationship with and without plotting the graph, we can calculate the slope between each pair of points.
The slope of a line between two points [tex](x_{1} , y_{1})[/tex] and [tex](x_{2} , y_{2})[/tex] is given by the formula:
slope = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1}}[/tex]
Let's calculate the slope between the first two points (1,1) and (2,2):
slope = (2 - 1) / (2 - 1) = 1/1 = 1
Now, let's calculate the slope between the second and third points (2,2) and (3,6):
slope = (6 - 2) / (3 - 2) = 4/1 = 4
Next, let's calculate the slope between the third and fourth points (3,6) and (4,24):
slope = (24 - 6) / (4 - 3) = 18/1 = 18
As we can see, the slopes between the pairs of points are not equal. In fact, they are increasing at a faster and faster rate. Therefore, the relationship between the x and y values is nonlinear.
To determine the specific type of nonlinear relationship, we can try to fit a curve to the data points. In this case, we can see that the points follow an exponential pattern, where the y-values increase rapidly as x increases. The equation that fits this pattern is y = [tex]2^x[/tex].
Therefore, the given points (1,1), (2,2), (3,6), (4,24) represent a nonlinear relationship that follows the exponential function y = [tex]2^x[/tex].
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Write an equation of the parabola that passes through the points in the table.
x y -8 -309 -5 -132 1 6 2 1 6 -99
Answer:
y = -2x² + 7x - 11
Step-by-step explanation:
To find the equation of a parabola that passes through the given points, we need to first determine the form of the equation.
A general form of a quadratic equation is y = ax^2 + bx + c, where a, b, and c are constants. To determine the values of a, b, and c, we substitute the coordinates of each point into the equation and solve the resulting system of equations.
Substituting the first point (-8, -309), we get:
-309 = a(-8)^2 + b(-8) + c
Substituting the second point (-5, -132), we get:
-132 = a(-5)^2 + b(-5) + c
Substituting the third point (1, 6), we get:
6 = a(1)^2 + b(1) + c
Substituting the fourth point (2, 1), we get:
1 = a(2)^2 + b(2) + c
Substituting the fifth point (6, -99), we get:
-99 = a(6)^2 + b(6) + c
Expanding the terms, we get a system of five equations:
64a - 8b + c = -309
25a - 5b + c = -132
a + b + c = 6
4a + 2b + c = 1
36a + 6b + c = -99
Solving the system of equations, we get:
a = -2
b = 7
c = -11
Therefore, the equation of the parabola that passes through the given points is:
y = -2x^2 + 7x - 11
So the answer is y = -2x² + 7x - 11. (^2 is just another version of ²)
Hope this helps!! I'm sorry if it's wrong. If you need more help, ask me! :]
Premise: All multiples of 9 are multiples of 3. Premise: 57 is a multiple of 3. Conclusion: 57 is a multiple of 9.
Answer:
The conclusion is false.
Step-by-step explanation:
[tex]\frac{57}{3} = 19\\\\\frac{9}{3} = 3[/tex]
Although 3 and 9 do share some multiples, they must be divisible by 3. For example. 36/3 = 12, and 12 is divisible by 3. However, 57/3 = 19, which is not divisible by 3.
Suppose a normal distribution has a mean of 62 and a standard deviation of
4. What is the probability that a data value is between 55 and 63? Round your
answer to the nearest tenth of a percent.
O A. 55.9%
O B. 56.9%
O C. 53.9%
O D. 54.9%
Answer:To solve this problem, we need to standardize the values of 55 and 63 to z-scores and then use the standard normal distribution table to find the area between those two z-scores.
The z-score for a value of 55 is:
z = (55 - 62) / 4 = -1.75
The z-score for a value of 63 is:
z = (63 - 62) / 4 = 0.25
Using a standard normal distribution table, we can find that the area to the left of z = -1.75 is 0.0401 and the area to the left of z = 0.25 is 0.5987. Therefore, the area between z = -1.75 and z = 0.25 is:
0.5987 - 0.0401 = 0.5586
To convert this area back to a percentage, we multiply by 100:
0.5586 * 100 ≈ 55.9%
Therefore, the answer is A. 55.9%.
Step-by-step explanation:
Sam rents a truck from a hire company.
The cost to rent the truck is directly proportional to the number of kilometres driven.
The rental cost to drive 200 km is $87.50.
What is the rental cost to drive 80 kilometres?
The rental cοst tο drive 80 km is $35.
We knοw that the rental cοst is directly prοpοrtiοnal tο the number οf kilοmeters driven. Let's call the rental cοst C and the number οf kilοmeters driven D. Then we can write:
C = kD
where k is the cοnstant οf prοpοrtiοnality. We need tο find the value οf k in οrder tο answer the questiοn.
We knοw that the rental cοst tο drive 200 km is $87.50, sο we can plug in these values and sοlve fοr k:
87.50 = k × 200
k = 87.50/200
k = 0.4375
Nοw that we knοw the value οf k, we can use the same equatiοn tο find the rental cοst tο drive 80 km:
C = kD
C = 0.4375 × 80
C = 35
Therefοre, the rental cοst tο drive 80 km is $35.
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in a class of 40 students,18 passed maths,19passed account,16 passed economics,5 passed math and accounts only,6maths only,9accounts only,2account and economics only,if each students offered at least one of the subjects:how many failed in all the subjects. (b) find the percentage number who failed in at least one of economics and mathematics. (c). calculate the probability that a student at random failed?
a. The number of students that failed in all subject is 4
b. The percentage of students who failed one of economic and mathematics is 5.2%
c. The probability that a student at random failed is 1/10
What is set?A set is defined as the collect of item with similarities.
n( of student that passed math only) = 6
n( of students that passed account only) = 9
n( of students that passed economics only) = 16-(4+3+2)
= 16-9 = 7
n ( of student that passed math and account only) = 5
n( of student that passed account and economics only) = 2
n ( of student that passed math and economics only) = 18-(5+3+y) = 6
= 18-8-y = 6
= 10-y = 6
y = 4
n( of students that passed all the three subjects) =19-( 5+2+x) = 9
= 19-7-x = 9
= 12 -x = 9
-x = -3
x = 3
a. Therefore no of student that failed all subject =
6+9+7+5+2+4+3+z = 40
36+z = 40
z = 40-36 = 4
b. Student that failed at least math and economics = 4+9 = 13
= 13/40 × 100 = 5.2%
c. probability that a student at random failed = 4/40 = 1/10
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