Question

?? please help ☹️ I'm tired

Answer 1

13 units

Explanation:

Hello!

The area of a trapezoid is
`(b_1 + b_2)/(2) * h`.

So, given the area is 100 units², and the height is 10 and one base is 7, solve for the other base:

• 
  `(b_1 + 7)/(2) * 10 = 100`
• 
  `(b_1 + 7)/(2) = 10`
• 
  `b_1 + 7 = 20`
• 
  `b_1 = 13`

The missing base is 13 units.