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PilotLPTM [1.2K]

4 years ago

15

Find the sum and choose the correct answer.

1 answer:

hodyreva [135]4 years ago

7 0

To put it in the simplest words :
Get rid of the parentheses and add like so:
$2n^3 - 8n^2 + 7 + n^3 + 8n - 9
$
<span>Combine like terms
2n^3+n^3= 3n^3
-8n^2 remains the same since there are no like terms for it
8n also remains the same
-9+7=-2
Put all of the numbers together
3n^3-8n^2+8n-2
Final answer:
B - the 2nd one</span>

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You have to simplify it <br> -2x+3-(5-6x)

UkoKoshka [18]

Answer: 4x−2

Step-by-step explanation:

-2x+3-(5-6x) remove the parentheses

-2x+3-5+6x collect like terms

(−2x+6x)+(3−5) simplify to get 4x−2

Hope this helps, have a blessed and wonderful day! :-)

- Cutiepatutie

5 0

4 years ago

Read 2 more answers

Scientific models can be used for a variety of different purposes. Which of the following statements about scientific models is

yKpoI14uk [10]

Answer:

<u>D</u>

Step-by-step explanation:

<u>Characteristics of scientific models</u>

They can save money and lives
They allow scientists to test their predictions
They allow scientists to study systems that no longer exist
They are widely used

Out of the given options, only <u>D</u> is an incorrect statement.

7 0

2 years ago

Determine the equation of the line that passes through the points (-1 , 10) and (2,4)

docker41 [41]

Given:

The two points are (-1,10) and (2,4).

To find:

The equation of line which passes though the given points.

Solution:

If a line passes through two points, then the equation of line is

$y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)$

The line passes through (-1,10) and (2,4). So, the equation of line is

$y-10=\dfrac{4-10}{2-(-1)}(x-(-1))$

$y-10=\dfrac{-6}{2+1}(x+1)$

$y-10=\dfrac{-6}{3}(x+1)$

$y-10=-2(x+1)$

Using distributive property, we get

$y-10=-2x-2$

Adding 10 both sides, we get

$y=-2x-2+10$

$y=-2x+8$

Therefore, the required equation of line is $y=-2x+8$ .

5 0

3 years ago

What is the volume of a<br> cube that has one side of ||<br> cm?

yulyashka [42]

Answer:

5

Step-by-step explanation:

633 yess sjs this is rhe im doing this for points

8 0

3 years ago

Read 2 more answers

A bookmark is shaped like a rectangle with a semicircle attached at both ends. The rectangle is 16 cm long and 4 cm wide. The di

Sedaia [141]

Answer: 76.56sqcm

Step-by-step explanation:

Area of rectangle= length * width

= 16 * 4 = 64sqcm

Area of semicircle= (1/2)(r^2)π

r= d/2= 4/2= 2

Area of semicircle= (1/2)(2^2)(3.14)

= 6.28sqcm

Area of bookmark= Area of rectangle + 2*Area of semicircle

Area of bookmark= 64 + 2(6.28)

=64 + 12.56 = 76.56sqcm

3 0

3 years ago