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2 years ago

Can someone help me do this problem and explain it to me step by step? If so I’ll mark you brainliest

Mathematics

1 answer:

Advocard [28]2 years ago

7 0

Answer:

-21

Step-by-step explanation:

1) if r = -4

Substitute r = -4 in 3r - 9

= 3 * (-4) - 9

= -12 - 9

= -21

2) ( 4 / 7 ) * x = 16

4 * x = 16 * 7

x = 4 * 7

x = 28

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<img src="https://tex.z-dn.net/?f=%20%20%5Csqrt%7B8x%20%2B%2012%20%2B%204%20%3D%2010%7D%20" id="TexFormula1" title=" \sqrt{8x +

tiny-mole [99]

Answer:

x=3

Step-by-step explanation:

I am assuming that your equation is:

$\sqrt{8x + 12} + 4 = 10$

Subtract 4 from both sides to get:

$\sqrt{8x + 12} = 6$

Square both sides to get:

$(\sqrt{8x + 12})^{2} = {6}^{2}$

$8x + 12 =3 6$

$8x =24$

Divide both sides by 8 to get:

$x = \frac{24}{8} = 3$

6 0

3 years ago

What is the quotient of the following rational expression?

anyanavicka [17]

What’s the expression?

3 0

2 years ago

2x + 4y = 22<br> What is the answer?

Goryan [66]

Answer:

Step-by-step explanation:

y=-\frac{1}{2}x+\frac{11}{2}

5 0

2 years ago

Read 2 more answers

What is my fav color/ what is statistical and non statistical

frez [133]

Answer:

changed my mind i say pink and rose gold but for me its Blue

and

statistical is relating to the use of statistics.

and

non statistical is not of, relating to, based on, or employing the principles of statistics

If brainiest is earned its greatly appreciated.

3 0

2 years ago

If you could help I would really appreciate it, but if not that’s fine. Thank you.

zloy xaker [14]

Answer:

2x - 5 if x ≤ 2

f(-1) = -7

Step-by-step explanation:

x ≤ 2 = (-1) ≤ 2

x > 2 = (-1) > 2

2x - 5

2(-1) - 5

-2 - 5

-7

8 0

2 years ago