Question

1. factor the expression using the gcf: 30x - 40

Explanation:

Step1: Find GCF of 30 and 40

Factors of 30: 1,2,3,5,6,10,15,30
Factors of 40: 1,2,4,5,8,10,20,40
GCF = 10

Step2: Factor out GCF from each term

$30x - 40 = 10 \times 3x - 10 \times 4 = 10(3x - 4)$

Answer:

$10(3x - 4)$