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3 years ago

Which algebraic expression is equivalent to the expression below?

Mathematics

1 answer:

Anna007 [38]3 years ago

6 0

Answer:

$\boxed {52x - 45}$ (Choice B)

Step-by-step explanation:

Solve the following expression:

$9(5x - 5) + 7x$

-Use <u>Distributive Property</u>:

$9(5x - 5) + 7x$

$45x - 45 + 7x$

-Combine like terms:

$45x - 45 + 7x$

$\boxed {52x - 45}$

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Lexi can paint 5 yards of fencing in one hour. At this rate how many inches does she paint per min?

Kisachek [45]

1 yard is 36 inches

so 5 yards are 180 inches

1 hour is 60 minutes

so in 60 minutes she paints 180 inches

or in 1 minute she paints 3 inches

7 0

3 years ago

What is the product of the polynomials below

Scrat [10]

Answer:

B. $15x^{4}$ + 2x³ - 8x² - 22x - 15

Step-by-step explanation:

1. (3x² - 2x - 3)(5x² + 4x +5)

$15x^{4}$ + 12x³ + 15x² - 10x³ - 8x² - 10x - 15x² - 12x - 15

2. Combine like terms

$15x^{4}$ + 2x³ - 8x² - 22x - 15

8 0

3 years ago

In a statistics course, a linear regression equation was computed to predict the final-exam score from the score on the first te

Elanso [62]

Answer:

Predicted final score of Josh $= 62.5$

Step-by-step explanation:

The linear regression relationship has been established between the final-exam score and the score on the first test

The relation ship is represented by a linear equation -

$y = 10 + 0.75 x\\$

Where

$x=$ score on the first test

$Y=$ final-exam score

Substituting the value of $x$ in above equation we will get -

$Y = 10 + 0.75 * 70\\Y = 10 + 52.5\\Y = 62.5$

Predicted final score of Josh $= 62.5$

6 0

3 years ago

How do I solve for the fourth term in this sequence?

tatiyna

Answer:

Step-by-step explanation:

d(1) = 13

d(n) = d(n - 1) + 17

where

n is the nth term

To find the 4th term we must first find the second term use it to find the 3rd term and use the 3rd term to find the 4th term

So we have

That's d(2)

We have

d(2) = d(2-1) + 17

d(2) = d(1) + 17

But d(1) = 13

d(2) = 13 + 17 = 30

That's

d(3) = d(3 - 1) + 17

d(3) = d(2) + 17

d(3) = 30 + 17 = 47

We have

d(4) = d(4 - 1) + 17

d(4) = d(3) + 17

d(4) = 47 + 17

We have the final answer as

Hope this helps you

3 0

3 years ago

During a field trip, 60 students are put into equal-sized groups. Describe two ways to interpret 60 ÷ 5 in this problem *

sergeinik [125]

Answer:

$x=12 groups$

This will give 5 Students each in 12 different equally sized groups

$x'=5groups$

This also shows that students can grouped in equal groups of 12 in 5 places

Step-by-step explanation:

From the question we are told that

60 children in equal sized groups

Generally interpreting $60\div 5$ can be mathematically represented as

$x=\frac{60}{5}$

$x=12 groups$

This will give 5 Students each in 12 different equally sized groups

$x'=\frac{60}{12}$

$x'=5groups$

This also shows that students can grouped in equal groups of 12 in 5 places

6 0

3 years ago