Question

I need help with #8 & 9 plz show work :)

Answer 1

Step-by-step explanation:

(8) We need to find the expression that is equivalent to 15x + 8y.

Option (A) :

$5(3x+y)-3y=15x+5y-3y=15x+2y$

Option (B) :

$15x-2y-10$

Option (C)

$3(5x+2y)+2y=15x+6y+2y=15x+8y$

Option (D)

$10(x+y)+5y-2x=8x+15y$

So, the correct option is (c).

(9) We need to solve the following equation for q.

$p(q+r)=1$

Dividing both sides of the above equation by (q+r) as :

$p=\dfrac{1}{(p+r)}$

Hence, this is the required solution.

Answer 2

C because if you distribute the 5 it is (15x+6y)+2y which is equivalent to 15x+8y