Question

I need help on number 1.

Answer 1

The equation is 70 = 8 3/4b/2 and the answer is 6 inches.

Explanation:
The formula for triangle is a = bh/2, where a represents area, b is base, and h is height. So we can substitute what we know : 70 = 8 3/4b/2. Now we solve the equation

1) Multiply both sides by 2 because we want to get rid of the 2 on the right side
70 x 2 = 8 3/4b/2 x 2
140 = 8 3/4b

2) We want to have one b instead of 8 3/4, so we divide both sides by 8 3/4
140 / 8 3/4 = 8 3/4b/ 8 3/4
16 = b
b = 16