Isabel purchased a prepaid phone card for $20. Long-distance calls cost 18 cents a minute using this card. Isabel used her card only once to make a long-distance call. If the remaining credit on her card is $14.24, how many minutes did her call last?

Answer: Rational

Step-by-step explanation:

21[tex]\pi[/tex] is rational because it is [tex]\pi[/tex] times 21 which is 65.9734457254 and numbers that terminate or repeat are rational.

Answer:

32 ounces

Step-by-step explanation:

1 lb = 16 ounces

2 lbs = 2 * 16 = 32 ounces

The time when the ball hit the ground, which is thrown from a height of 70 meters with an initial downward velocity of 10 m/s is 2.87.

A quadratic equation is the equation in which the unknown variable is one and the highest power of the unknown variable is two.

The standard form of the quadratic equation is,

[tex]ax^2+bx+c=0[/tex]

Here,(a,b, c) is the real numbers and (x) is the variable. To solve the equation for x, use the following formula,

[tex]x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]

The ball's height h (in meters) after t seconds is given by the following.

[tex]h=70-10t-5t^2[/tex]

The ball is thrown from a height of 70 meters with an initial downward velocity of 10 m/s. In this case,

The time when the ball hit the ground has to be find out. The value of the height when it hit the group is zero. Put the value of h=0 in the above equation,

[tex]h=70-10t-5t^2\\0=70-10t-5t^2\\5t^2+10t-70=0\\5t^2+10t-70=0\\[/tex]

Solve the quadratic equation using the following formula,

[tex]t=\dfrac{-10\pm \sqrt{10^2-4(10)(-70)}}{2\times5}\\t=-4.87, t=2.87[/tex]

Consider positive value. Thus, the time when the ball hit the ground, which is thrown from a height of 70 meters with an initial downward velocity of 10 m/s is 2.87.

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Answer:

98,000 bacteria.

Step-by-step explanation:

We are given the formula:

[tex]P=le^{kt}[/tex]

Where l is the initial population, k is the rate of growth, and t is the time ( in hours).

We know that it has an initial population of 500. So, l is 500.

We also know that the population grows to 7000 after 2 hours.

And we want to find the population after 4 hours.

First, since we know that the population grows to 7000 after 2 hours, let's substitute 2 for t and 7000 for P. Let's also substitute 500 for l. This yields:

[tex]7000=500e^{2k}[/tex]

Divide both sides by 500:

[tex]e^{2k}=14[/tex]

We can solve for the rate k here, but this is not necessary. In fact, when can find our solution with just this.

Let's go back to our original equation. We want to find the population after 4 hours. So, substitute 4 for t:

[tex]P=500e^{4k}[/tex]

We want to find the total population, P. Notice that we can rewrite our exponent as:

[tex]P=500(e^{2k})^2[/tex]

This is the exact same thing we acquired earlier. So, we know that the expression within the parentheses is 14. Substitute:

[tex]P=500(14)^2[/tex]

Square and multiply:

[tex]P=500(196)=98000[/tex]

So, after 4 hours, there will be 98,000 bacteria.

And we're done!

Answer:

-17

Step-by-step explanation:

You have to simplify the expression!

Answer:

-17

Step-by-step explanation:

Answer:

It would be -[tex]\frac{1}{2}[/tex]

Step-by-step explanation:

Use the slope formula to find the slope  m.

Answer:

3x^2+2x+15

Step-by-step explanation:

3x^2+2x+2+(4x2)+5

use pemdas

Answer:

smhhh

Step-by-step explanation:

Answer:

There were 7 small boxes and 14 large boxes shipped.

Step-by-step explanation:

This problem may be solved by a system of equations:

I am going to say that:

x is the number of small boxes used

y is the number of large boxes used

There were twice as many large boxes shipped as small boxes shipped

This means that y = 2x

Each small box of paper weighs 45 pounds and each large box of paper weighs 80 pounds. The total weight of all boxes was 1435 pounds.

This means that 45x + 80y =1435

So we have to solve the following system:

y=2x

45x + 80y =1435

45x + 80 (2x) = 1435

205x = 1435

x= 1435/205

x=7

y=2x= 2(7) = 14

There were 7 small boxes and 14 large boxes shipped.

Answer: 22

Step-by-step explanation:

Answer:

22

Step-by-step explanation:

Don't worry, don't worry child. Oh, geometry. How lucky are you: finally knowing this treasury of humanity. I'm jealous now. Haha.

In the annex, you can see what is happening :)

Look that, if a and b are paralels, 4x + 28 is External Alternate of the Opposite Vertex of 116, which is also 116. Then, they have the same value: 4x + 28 = 116.

If you don't remember those concepts, review the initial part of geometry. The proof of that is quite simply, moreover is easy to mentally deduce that.

Regression equations can be linear, quadratic or exponential

The graph that would most likely be associated with the given model is (b)

The regression equation is given as:

[tex]n(t) = 3.53t^2 - 33.04t + 117.56[/tex]

The above regression equation is a quadratic function (and non-linear).

So, the graph must represent a non-linear relationship.

From the given graphs, only graph (b) represents a quadratic function.

Other options are either linear models or exponential.

Hence, the graph that would most likely be associated with the given model is (b)

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Answer:

Its B

Step-by-step explanation:

Answer:

5(y - 2)

Step-by-step explanation:

What is the GCF (Greatest Common Factor) for 5y and -10? It is 5 so you take  5 out of 5y and 5 out of -10. You put the 5 outside of the parentheses and put y - 2 inside of the parentheses. That is how you factorize 5y - 10

The factorized form of 5y - 10 is 5(y - 2).

Factorization in mathematics is the process of dividing a large number into smaller ones that when multiplied together, give you the original number. Factorization is the process of dividing a number into its components or divisors.

When we are asked to factorize an expression, we are essentially trying to write the expression as a product of simpler expressions. In this case, we want to write 5y - 10 as a product of simpler expressions.

One way to approach this is to look for a common factor that is present in both terms of the expression.

In this case, we can see that both 5y and 10 are divisible by 5. Therefore, we can factor out the greatest common factor of the two terms, which is 5.

When we factor out 5 from 5y and -10, we are left with:

5y - 10 = 5(y - 2).

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Answer:

Y= 43, x=137, z=137 total is 360

Answer:

D

Step-by-step explanation:

(3^2x5)^3=91125

3^6x5^3=91125

The answer is 9 3⁶ x 5³

(3² x 5)³= 91125

3⁶ x 5³ = 91125

Answer:

9 apples.

Step-by-step explanation:

27/3=9

Answer:

5 3/7

Step-by-step explanation:

Answer:

let's see what to do

Step-by-step explanation:

[tex] \frac{38}{7} = \frac{35 + 3}{7} = \frac{35}{7} + \frac{3}{7} = 5 + \frac{3}{7} \\ [/tex]

End....

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Answer:

-0.86

Step-by-step explanation:

12x + 9 = 2x - 15 + 5x + 2

Combine

19x = -22

Answer:

2.93

Step-by-step explanation:

3.15×7/100=0.2205

3.15-0.2205=2.9295

The cost of the jeans before tax $2.9295

"It is a number or ratio that can be expressed as a fraction of 100."

For given example,

Let 'a' be the original price of the jeans.

Let 'b' be the price of the jeans with tax.

then, b = a + tax

Juan paid $3.15 in tax for the jeans.

The sales tax on a pair of jeans is 7 percent.

First we find the tax on a pair of jeans.

⇒ tax = b × 7%

⇒ tax = 3.15 × (7/100)

⇒ tax = $0.2205

We need to find the cost of the jeans before tax.

Here, b = $3.15, tax amount = $0.2205

⇒ b = a + 0.2205

⇒ 3.15 = a + 0.2205

⇒ a = 3.15 - 0.2205

⇒ a = $2.9295

Therefore, the cost of the jeans before tax $2.9295

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By inspection, we can see that x = ±√2, since (±√2)⁴ = 2² = 4.

In particular, if [tex]x^n=n[/tex], which means [tex]x=n^{\frac1n}[/tex], then [tex]x^{x^n}=x^n=n[/tex].

Let x = √2. Then

[tex]x^{x^2}+x^{x^8}=(\sqrt2)^{(\sqrt2)^2}+(\sqrt2)^{(\sqrt2)^8}[/tex]

[tex]x^{x^2}+x^{x^8}=(\sqrt2)^2+(\sqrt2)^{16}[/tex]

[tex]x^{x^2}+x^{x^8}=2+256[/tex]

[tex]x^{x^2}+x^{x^8}=\boxed{258}[/tex]

Answer:

50

Step-by-step explanation:

62+(3·4)−24

62+12-24

Final Answer: 50

Answer:

50

Step-by-step explanation: :D

Answer:

x=17

Step-by-step explanation:

These are corresponding angles, meaning they have the same measure. We must set them equal to each other.

Hope this helps :-)

Option A)

Yes, Fraction 37/8 is a rational number because the decimal form of the number is terminal.

.

A Rational Number is any number that can be expressed as a fraction or ratio of two integers.

For example, 3/4, 8.75, 2, and -6 are all considered rational numbers.

Note that integers, or "whole numbers", are rational numbers. This is because they can be expressed as fractions.

For example, 2 can be rewritten as 2/1, or 200/100. -6 can be rewritten as -6/1, 6/-1, or -12/2.

Many non-integer, or decimal numbers, are also rational numbers.

For instance, 8.75 can be rewritten as 8 3/4, 875/100, or 1750/200. This also includes repeating decimal numbers like 0.3333333..., which can be rewritten as 1/3.

Fraction = 37 /8

Numerator = 37

Denominator = 8

Both are integer

The fraction of 37 divided by 8  = 37/8 is a Rational Number because both the numerator and denominator are integers.

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Answer:

The value of ending inventory will be items of latest purchase.

Step-by-step explanation:

Given that,

Lisa Company uses the periodic inventory system to account for inventories.

Information related to Lisa Company's inventory at October 31 is given,

Suppose, find the value of ending inventory using the FIFO cost assumption if 500 units remains on hand at october 31

We need to calculate the value of ending inventory

Using FIFO method

[tex]value\ of\ ending\ inventory =305\ units\times\$10.6+195\ units\times\$11.60[/tex]

[tex]value\ of\ ending\ inventory = 3233+2262[/tex]

[tex]value\ of\ ending\ inventory =\$5495[/tex]

Hence, The value of ending inventory will be items of latest purchase.

Answer:

Slope: 5

X Intercept: (8.2,0)

Y Intercept: (0, -41)

Step-by-step explanation:

Slope:

y2-y1/x2-x1=9-(-6)/10-7=9+6/10-7=15/3=5

y=5x-41 - the slope intercept form

X Intercept:

if y=0

0=5x-41

+41  +41

41=5x

8.2=x

(8.2,0)

Y Intercept:

if x=0

y=-41

(0,-41)

hope this helps

brainliest?

Answer:

1) -0.016 pounds per square inch per cubic inch.

2) [tex]\displaystyle V'(P)=-\frac{800}{P^2}[/tex]

Step-by-step explanation:

We are given the equation [tex]PV=800[/tex].

Part A)

We want to determine the average rate of change of P as V increases from 200 cubic inches to 250 cubic inches.

To find the average rate of change between two points, we find the slope between them.

Rewrite the given equation as a function of V:

[tex]\displaystyle P(V)=\frac{800}{V}[/tex]

Hence, the average rate of change for V = 200 and V = 250 is:

[tex]\displaystyle \begin{aligned} m &= \frac{P(250) - P(200)}{250 - 200} \\ \\ & = \frac{3.2 - 4}{250 - 200} \\ \\ & = -0.016\end{aligned}[/tex]

Therefore, the average rate of change is -0.016 pounds per square inch per cubic inch.

Part B)

We want to express V as a function of P. This can be done through simple division:

[tex]\displaystyle V(P)=\frac{800}{P}[/tex]

We want to show that the instantaneous change of V with respect to P is inversely proportional to the square of P. So, let's take the derivative of both sides with respect to P:  

[tex]\displaystyle \frac{d}{dP}\left[V(P)\right]=\frac{d}{dP}\left[\frac{800}{P}\right][/tex]

Differentiate. Note that 1/P is equivalent to P⁻¹. This allows for a simple Power Rule:

[tex]\displaystyle \begin{aligned} V'(P) & = 800\frac{d}{dP}\left[ P^{-1}\right] \\ \\ & = -800(P^{-2}) \\ \\ & = -\frac{800}{P^2}\end{aligned}[/tex]

Therefore, the instantaneous change of V is indeed inversely proportional to the square of P.

Answer:

Use the drop-down menus to complete each statement.

The amplitude of the function is  

✔ 48

.

The period of the function is  

✔ 28

.

The graph has a vertical shift of  

✔ 48

units.

Step-by-step explanation:

i got the question wrong for you homies, these were the correct ones on edge2020

Answer:

x= -3 is the answer

UW=3 is the answer..

hope it helps you mate

please mark me as brainliast

Answer:

From the given figure, we can see that the 2 given line segments are equal in length

Hence,

11 + (x - 5) = 2x - 4

6 + 4 = x

x = 10

Now that we know the value of x, we can use it to get the length of the line segment UW

UW = 11 + (x - 5)

UW = 11 + (10 - 5)

UW = 11 + 5

UW = 16 units