Question

for each expression, select all equivalent expressions from the list. (a) 7x - 3x + 5x (b) 5(1 + 3y) 9x 9 + x 5x - 4x 4x + 5x 5 + 1 - 5 + 3y 5 + 15y 5·1 + 5·3y 5 + 3y

Explanation:

Step1: Simplify expression (a)

$7x - 3x+5x=(7 - 3 + 5)x=9x$

Step2: Simplify expression (b)

Using distributive property $a(b + c)=ab+ac$, for $5(1 + 3y)$, we have $5\times1+5\times3y = 5+15y$

Answer:

(a) 9x
(b) 5 + 15y, 5·1+5·3y