Question

quations.
4.
(b) 9-
3 x = -7​

Answer 1

Answer:

Step-by-step explanation:

Add 77 to both sides.

3x=9+7

3x=9+7

2 Simplify  9+79+7  to  1616.

3x=16

3x=16

3 Divide both sides by 33.

x=\frac{16}{3}

x=  

3

16

​  

 

Answer 2

Answer:

To find [f of g](x), you take g(x) and substitute it for x in f(x) to get:

[f of g](x) = 2(3x+b)+9

[g of f](x) is done the same way:

[g of f](x) = 3(2x+9)+b

Set them equal to each other and solve for b

2(3x+b)+9 = 3(2x+9)+b

6x+2b+9 = 6x+27+b

b=18