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nydimaria [60]
3 years ago
14

-16=-3(7a+8) what is a

Mathematics
1 answer:
user100 [1]3 years ago
6 0

-16=-3(7a+8)

multiply the bracket by -3

(-3)(7)=-21

(-3)(80=-24

-16=-21a-24

move -24 to the other side

sign changes from -24 to +24

-16+24=-21a-24+24

8=-21a

divide both sides by -21 to get a by itself

8/-21=-21a/-21

answer:

a=-8/21

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3 years ago
Determine the equation of the inverse of y=1/4x^3-2
dedylja [7]

<u>Answer</u>


y⁻¹ = ∛(4x+8)



<u>Explanation</u>

y=(1/4)x³ - 2.

To find the inverse of this equation, you first make x the subject of the formular.

y=(1/4)x³ - 2

Multiply both sides by 4;

4y = x³ - 8

Add 8 on both sides of the equation;

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x³ = 4y + 8

Apply the cube root on both sides to get the value of x;

x = ∛(4y+8)


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7 0
3 years ago
Z-6=15 what does z equal
zmey [24]

Answer:

z = 21

Step-by-step explanation:

z-6=15

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hope it helps!

5 0
3 years ago
Read 2 more answers
I need these three solved. I have a lot of math to do. the directions say solve each system of equations using substitution. sho
alekssr [168]

Answer:

5.

x + 2(x + 1) = 8 --> x = 2

y = 2 + 1 = 3

7.

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x = 9 + 2(-7/11) = 85/11

9.

3(-1 - 2y) + 5y = -1 --> y = -2

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6 0
3 years ago
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