Question

How do u do this?

Answer 1

Question

Answer 2

The midsgement of a trapezoid is give by \[EF = \frac{ AD + BC }{ 2 }\]

From the problem you are given that AD = x + 1
BC = 10 and EF = 3x-2

Answer 3

yup

Answer 4

Just plug those vales in. Then you will have an equation in which you can solve for x.

Answer 5

oh okay thx

Answer 6

19.
The sum of the lengths of BC and AD is twice the length of EF.
10 + (x + 1) = 2 (3 x - 2)

Answer 7

@robtobey can i do that to 20 also?

Answer 8

ef=13?

Answer 9

21. is the same set up or idea as 19.

Answer 10

okay but can u check if ef=13?

Answer 11

?

Answer 12

Neither of them is 13.

Answer 13

19.) 10 + (x + 1) = 2 (3 x - 2)

21.) 2 ( x+3) = x-2 + 2x

For both equations solve for x.

I'll do 21.) for you.

2x + 6 = x -2 + 2x

2x + 6 = 3x - 2

8 = x

Number 21.) x = 8


Do the same for 19.)

Answer 14

okay thx