please help for algebra 1

The amount of the 90gram-sample that will remain after 290 years is 9.88 grams

We'll begin by obtaining the number of half lives that has elapsed. This can be obtained as follow:

Step1

n = t / t½

n = 290 / 91

n = 3.1868

Step 2

determine the amount remaining:

The amount remain can be obtained as follow:

N = N₀ / 2^n

N = 90 / 2^3.1868

=9.88

N=9.88 grams

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The inequality model of the question will be -13 > x > -3

What is inequality?

Inequalities are mathematical expressions where neither side is equal. In inequality, as opposed to equations, we compare two values. Less than (or less than or equal to), greater than (or greater than or equal to), or not equal to signs are used in place of the equal sign in between. Sometimes it can be about a "not equal to" relationship, where one thing is more than the other or less than. In mathematics, an inequality is a relationship that results in a non-equal comparison between two numbers or other mathematical expressions.

9|x + 8| > 45

now when we remove the modulus there will be two terms.

|x + 8| > 45/9

|x + 8| > 5

-5>x + 8>5

-5-8>x >5-8

-13 > x > -3

Hence, the inequality model will be -13 > x > -3

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Answer:

8.75

Step-by-step explanation:

The equation that represents the proportional relationship is: k = 7.25.

A proportional relationship is a relationship between two variables such that one variable is a constant multiple of the other. A proportional relationship can be represented by an equation of the form y = kx where y and x are the variables, and k is the constant of proportionality. This equation can also be written as y/x = k.

From the given information, we have:

Constant of proportionality (k) = 21.75 / 3

k = 7.25

To write the equation, substitute k = 7.25 into y = kx:

y = 7.25x

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Answer:

x=71; y=19

Step-by-step explanation:

x+y = 90 so x =90-y = 14+3y

so  90=14+4y

90-14 = 4y

76=4y

y=19

x=71

Answer:

x = 71

y = 19

Step-by-step explanation:

I solved by graphing and got (71,19) as included in the image. A more mathematical way to solve is by substitution. You try to find x with one of the equations, plug in x and then solve for y.

x + y = 90

x = 90 - y

90 - y = 14 + 3y

90 - y + y= 14 + 3y + y

90 = 14 + 4y

90 - 14= 14 + 4y - 14

76= 4y

19 = y

x + y = 90

x + (19) = 90

x + 19 - 19= 90- 19

x = 71

The concept here is the Research method, it is the main extent to which a concept, conclusion, or measurement is well-founded  The answer is validity.

Research methods are strategies, processes, or ways used to collect data or substantiation for analysis to uncover new information or better understand the content.

Validity is the lesser degree to which an idea, conclusion, or action is reasonable and likely to directly reflect reality. The word" valid" comes from the Latin Validus, which means strong.

The validity of a dimension instrument is the extent to which the instrument measures what it's intended to measure. Validity refers to the relationship between the study thing and the data the experimenter chooses to use to quantify that thing. Some confines similar to physical strength, aren't naturally related to intelligence.

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The value of the 47th term of the given arithmetic sequence is -55.7

An arithmetic sequence is a sequence of numbers in which the difference between consecutive terms is always the same.

We are given the explicit rule for an arithmetic sequence as follows -

[tex]a_n[/tex] = 8.7 - 1.4(n-1)

We have to find the value of the 47th term in the series.

So, we have the value of n = 47

The equation will become -

[tex]a_{47}[/tex] = 8.7 - 1.4(47-1)

[tex]a_{47}[/tex] = 8.7 - 1.4(46)

[tex]a_{47}[/tex] = 8.7 - 64.4

[tex]a_{47}[/tex] = -55.7

Thus, the value of the 47th term of the given arithmetic sequence is -55.7

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For the given case The boss has failed to satisfy the condition of random sampling without replacement. This condition states that the samples must be taken randomly and with replacement, meaning that each sample is replaced after it has been selected.

In this case, the boss picked the 50 names out of the hat without replacing them, which means that the same names could have been picked more than once. This can lead to a sample bias, as the same names may be overrepresented in the sample. This lack of randomness can lead to an inaccurate estimate of the proportion of employees who are satisfied with the company's parking policy.

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Answer:

183 charters

7 goes into 12 1 time so 12-7=5

bring down the 8 so 7x8=56 so 58-56=2

being down the 1 and you have 21. 7 goes into 21 three times.

Answer:

183 characters per minute

Step-by-step explanation:

1281 divided by 7

Answer:

550 - 12x = 370

The supplied input should simply be replaced in the function definition for that precise interval.

An equation or set of equations, rather than a single equation, defines a piecewise-defined function. For a specific interval, each equation is valid.

Find out to which of the above intervals (or inequalities) the supplied input belongs before evaluating a piecewise function at any given input. The function definition for that specific interval should therefore just have the specified input replaced.

When a rule or relationship changes as an input value passes specific "boundaries," we refer to these instances as piecewise functions. For instance, scenarios where the price per piece of a specific item is decreased once the quantity requested exceeds a given amount are frequent in business.

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If the mean number of home goals is 2.5 and away goals is 1.88 , then the number of home and away games have been played in total is 32 games .

From the histogram , we get that ,

the total number of home goals is = 9 + 6 + 8 + 7 = 30 goals ;

the total number of away goals is = 2 + 7 + 4 + 5 = 18 goals ;

the mean number of home goals is = 2.5 ;

the mean number of away goals is = 1.8  ;

we know formula that⇒ Mean Goal = (total goals)/(number of games) ;

For Home goals :

⇒ 2.5 = 30/n ⇒ n = 30/2.5 = 22 games .

For Away goals :

⇒ 1.8 = 18/n ⇒ n = 18/1.8 = 10 games .

So , total number of games is = 10 + 22 = 32 games ,

Therefore , In total the total number of home and away games played is 32 games .

The given question is incomplete , the complete question is

Here is some information about the goals scored in some hockey games. Each game has four quarters. the histogram is given below :

The mean number of home goals scored is 2.5  ;

The mean number of away goals scored is 1.8  ;

How many home and away games have been played in total ?

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The height of the trapezoid that has an area of 24 cubic cm is: 3 cm.

The formula for the area of a trapezoid is 1/2(a+b)h, where a and b are the lengths of the bases and h is the height.

Given that the area of the trapezoid is 24 cubic centimeters and the base lengths are 9 cm and 7 cm, we can plug in those values to the formula and solve for h:

24 = 1/2(9+7)h

24 = 1/2(16)h

24 = 8h

To find h, we divide both sides of the equation by 8:

h = 24/8

h = 3

So the height of the trapezoid is 3 cm.

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The area of the rectangle would be 96 square inches.

Option (D) is correct.

What is the area of the rectangle?

The formula for the area of a rectangle is:

Area = length x width

where length is the distance along the longer side of the rectangle and width is the distance along the shorter side of the rectangle.

In the given figure,

The length of the rectangle = 8 + 8 = 16 inches.

Now by using the Pythagoras theorem, we can find the height

  [tex]Height= \sqrt{(10)^2-(8)^2} \\\\=\sqrt{100-64}\\\\=\sqrt{36}\\\\=6[/tex]

So the base would be 6 inches.

Now we can find the area of the rectangle

Area = 16 * 6

Area = 96 square inches.

Hence, the area of the rectangle would be 96 square inches.

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The measurement of angles formed by intersecting line segments UT and WV are -

∠TXV = 25°

∠UXW = 25°

∠TXW = 155°

∠UXV = 155°

What is a line segment?

A line segment in geometry has two different points on it that define its boundaries. A line segment is sometimes referred to as a section of a line that links two places. The difference between a line and a line segment is that a line has no endpoints and can go on forever in either direction.

Two line segments UT and WV are given.

The line segment UT and WV are intersecting each other at a point X.

Due to the intersection many angles are formed.

To find the measure of the angles, use the protractor.

The first angle is ∠TXV.

Keep the protractor's midpoint at point X.

Then turn the protractor so that it aligns with line UT.

The measure of ∠TXV is approximately 25°.

The second angle is ∠UXW.

Keep the protractor's midpoint at point X.

Then turn the protractor so that it aligns with line WV.

The measure of ∠UXW is approximately 25°.

The third angle is ∠TXW.

Keep the protractor's midpoint at point X.

Then turn the protractor so that it aligns with line WV.

The measure of ∠TXW is approximately 155°.

The fourth angle is ∠UXV.

Keep the protractor's midpoint at point X.

Then turn the protractor so that it aligns with line UV.

The measure of ∠UXV is approximately 155°.

Therefore, all the four angles are obtained.

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Answer:

Hi, I'm Za'Riah! I will gladly assist you with your problem. (see explanation)

Step-by-step explanation:

see image

The quotient from 4,096 divided by 61  is between 66 and 67.

Answer:

x = 8

Step-by-step explanation:

0.75 * ( x+4) = 9

0.75x + 3 = 9

0.75x = 9 - 3

0.75x = 6

x = 6 / 0.75

x = 8

A relation might or might not be a function. The connection would cease to be a function because of b. (6, 8) and d. (4, 3).

Combinations are mathematical procedures that count how many different ways a collection of items could be arranged when the order in which they are chosen is immaterial.

Combos' components can be chosen in any hierarchy.

Combinations and permutations can coexist.

Hence, the ordered pair is given:

(x, y) = (1, 2); (2, 3); (4, 5); (6, 7); (12, 13)

For a relation to be a function, all of the x-values must be unique (i.e. no repetition)

From the list of alternatives, options (b) and (d), with x values (6, 7) and (d), already exist in the ordered pair (4,5)

In light of this, (b) and (d) would stop the connection from being a function.

Therefore, a relation might or might not be a function. The connection would cease to be a function because of b. (6, 8) and d. (4, 3).

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Correct question:

A bakery sells different packages of muffins. The number of muffins, x, and the price in dollars, y, of their packages of muffins are given in the ordered pairs below. The set of ordered pairs is a relation that is also a function.

{(1,2),(2,3),(4,5),(6,7),(12,13)}

The bakery is considering adding a new package of muffins. which ordered pairs would make the relation NOT a function? Choose all that are correct.

a. (10,13)

b. (6,8)

c. (8,12)

d. (4,3)

e. (24,18)

The angle subtended by arc BC on center of circle is of 2 times 65 = 130

What is Area of circle ?

Area of circle can be defined as the product of pi and the square of radius of a circle.

Using the property that angle subtended by an arc on center is double than on circumference, you can find measure of arc BC.

The angle subtended by arc BC on center of circle is of 2 times 65 = 130

Given,

The angle subtended by arc BC on circumference is 65 degrees.

We have to find  Length of arc BC

Relation between angle at center and angle at circumference by an arc:

"Angle subtended by an arc of a circle on its center is double than angle subtended by it on circumference"

Therefore , angle subtended by arc BC on center of circle is of 2 times 65 = 130 .

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The proportional relationship that models this situation is given as follows:

y = 2x.

The graph is given by the image presented at the end of the answer.

A proportional relationship is modeled as follows:

y = kx.

In which k is the constant of proportionality.

Susan's plane uses 2 kilograms of fuel for every unit she flies, hence the constant is given as follows:

k = 2.

The relationship is:

y = 2x.

The domain is:

x >= 0, as the number of units flied cannot be negative.

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The speed of the car is 59 miles per hour. Anna might have made an error by using change in y-coordinates/change in x-coordinates to find a unit rate, instead of change in x-coordinates/change in y-coordinates.

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The mathematical statement that accurately depicts how value of philipine peso is less than the value of one US dollar is: p < d. The Option C is correct.

The Less-than symbol is used to compare two values where the first number is less than the second number, for example, in ascending order. The opening angle bracket is approximated by the less than symbol.

"<" is the symbol used to represent the less than inequality. The less than sign is a universally recognized math symbol composed of two equal measure strokes intersecting in an acute angle at the left.

For example: If given 2< 5: 2 is less than 5

Missing options "Which of the following mathematical statement represents the given situation? a. d = p b. p>d c. p <d d. none of these​

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The percentage of students that prefer drama is 52%.

The percentage of students that go to the movies three times or more is 34%.

Percentage is the fraction of an amount that is expressed as a number out of hundred. The sign that is used to represent percentage is %. In order to change a number to percentage, multiply the number by 100.

The percentage of students that prefer drama = (total number of students that prefer drama / total number of students surveyed) x 100

= [(70 + 34) / 200] x 100

= (104 / 200) x 100 = 52%

The percentage of students that go to the movies three times or more = (total number of students that go to the movies three times or more / total number of students surveyed) x 100

[(34 + 34) / 200] x 100

(68 / 200) x 100 = 34%

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a) The old monthly payment was =  9.27 × 50 = 463.5

b) The new monthly payment is = 11.10 × 50 = 555

c) The percent increase in his monthly payment is 1.947 %

With a 25-year, 10.25% adjustable rate mortgage, Sandra Williams purchased a property. She made monthly payments of $9.27 per thousand on his initial debt.

According to the question,

The per thousand value of $65000 is, 50000/1000 = 50

Now, the old monthly payment was =  9.27 × 50 = 463.5

She makes the decision to renew and will now make monthly loan payments of $11.10 per thousand.

So, the new monthly payment is = 11.10 × 50 = 555

The percent increase in his monthly payment is = 11.10 /9.27 - 1 × 100

⇒ 19.7411 %

And to nearest tenth it is 1.947%

Hence, the old monthly payment was =  9.27 × 50 = 463.5

The new monthly payment is = 11.10 × 50 = 555

Thus, the percent increase in his monthly payment is 1.947%.

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Answer: -2, -1, 4, 4, 14, 14, 14, 30, 314, 314

The values are arranged in increasing order from least to greatest.

Check the picture below.

There is one point of intersection on the graph of y = x² + 3x - 2 and y - x = 4

To find the point of intersection, we need to set the two equations equal to each other and solve for x and y.

y = x² + 3x - 2

y - x = 4

x² + 3x - 2 - x = 4

x² + 2x - 6 = 0

(x-3)(x+2)=0

x =3 or x=-2

When x = 3, we substitute it into the first equation y = x² + 3x - 2

y = 3² + 3(3) - 2

y = 9 + 9 - 2

y = 16

When x = -2, we substitute it into the first equation y = x² + 3x - 2

y = -2² + 3(-2) - 2

y = 4 -6 -2

y = -4

So the point of intersection is (3,16) or (-2,-4)

Hence there is only one point of intersection on the graph of y = x² + 3x - 2 and y - x = 4

Large pack with 12 plates has better value of money with $1.77 for each plate comparison to smaller pack with $1.75 for each plate.

Number of plates in smaller pack is equal to 3 .

Cost of smaller pack with three plates = $5.25

Cost of each plate in smaller pack = $5.25 / 3

                                                         = $1.75

Number of plates in larger pack is equal to 12 .

Cost of larger pack with twelve plates = $21.24

Cost of each plate in larger pack = $21.24 / 12

                                                         = $1.77

$1.77 is greater than $1.75.

Larger pack of plates have better value of money for each plate comparing the smaller pack.

Therefore, the larger pack has better value of money than the smaller pack .

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The number of possible sandwiches does is 6.

What is combination ?

In arithmetic, a combination is a way of choosing gadgets from a set where the order of selection does no longer count. suppose we've got a hard and fast of 3 numbers P, Q and R. Then in what number of methods we can select two numbers from every set, is described via combination.

Given ,

Kim will choose 1 type of meat and 1 type of cheese for her sandwich. The meats offered are ham, turkey, or roast beef.

The cheeses offered are American, Swiss, cheddar, or provolone. Kim dislikes roast beef and Swiss cheese.

factorial of n! = n*(n-1) !

The number of possible sandwiches does  =  3!

=3*2 = 6.

Therefore, The number of possible sandwiches does is 6.

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Since the points on this graph represent a relationship between x- and y-values, a statement about the relationship which is true is that: A. it cannot be proportional because a straight line through the point does not go through the origin.

In Mathematics, a proportional relationship can be defined as a type of relationship that generates equivalent ratios and it can be modeled or represented by the following mathematical expression:

y = kx

Where:

Generally speaking, the graph of any proportional relationship is always characterized by a straight line with the data points starting from the origin (0, 0) and passes through other unique data points on the cartesian coordinate.

In conclusion, the relationship between the x-value and y-value isn't proportional because the straight line does not pass through the origin (0, 0).

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