Question

CBAD is a trapezoid. Fine CB

Answer 1

CB = 6

Explanation:

The length of the midsegment is the sum of the two bases divided by 2

so we can write an equation

`((-2+x)+12)/(2) =4x-23\\\\(10+x)/(2) =4x-23\\`

Multiply 2 to both sides

`10+x=2(4x-23)\\10+x=8x-46`

add 46 to both sides

`56+x=8x`

subtract x from both sides

`56=7x`

divide 7 on both sides

`8=x`

We found x but the question asked to find CB (-2+x) so now we fill in x with 8

`-2+(8)\\6`

hope this helps let me know if you have questions