All categories

3 years ago

Select the correct answer. Simplify the expression below. 4x(3x − 7) − 19x2 A. -7x2 − 7 B. -35x2 C. -7x2 − 28x D. -31x2 − 28x

Mathematics

1 answer:

morpeh [17]3 years ago

5 0

Answer:

$C. -7x^2-28x$

Step-by-step explanation:

The given expression is $4x(3x-7)-19x^2$

We apply the distributive property to expand the parenthesis

$12x^2-28x-19x^2$

Regroup similar terms to get:

$12x^2-19x^2-28x$

Combine the similar terms to obtain:

$-7x^2-28x$

The correct option is C.

You might be interested in

The management of an electronics firm has determined that the profit the company earns is a function of thenumber of employees i

ruslelena [56]

we have the function

$P(x)=\ln\left|4x+1\right|+3x-x^2$

For x=2

substitute

$\begin{gathered} P(x)=\operatorname{\ln}\lvert4(2)+1\rvert+3(2)-(2)^2 \\ P(x)=\operatorname{\ln}\lvert9\rvert+2 \\ P(x)=4.20\text{ millions of dollars} \end{gathered}$

therefore

<h2>the answer is 4.20 million dollars</h2>

6 0

1 year ago

Kelly's bill at a restaurant came to $21.52. If

uranmaximum [27]

$3.87 for the 18% tip.

6 0

3 years ago

Write 825 million in scientific notation.<br> please show your work

True [87]

Answer:

8.5* $10^7$

Step-by-step explanation:

825 million is

825,000,000

so you need to do 8.25 and then 10 to the power of 8

so the answer is 8.5* $10^8$

5 0

3 years ago

If the scale factor of my dilation is 4 , what is happening to my shape ?

anygoal [31]

Answer:

The shape is the same

Step-by-step explanation:

we know that

A dilation is a non rigid transformation, that change the size but not the shape of the original figure

If the dilation scale factor is 4, the figure size increases by 4, but the shape remains the same

4 0

3 years ago

-8, 22, 52, 82, ...<br> Find a 20

gladu [14]

Answer:

Step-by-step explanation:

It is an arithmetic sequence with common difference d = 30.

a₂₀ = a₁ + (20-1)d = -8 + 19·30 = 562

8 0

3 years ago