Question

Which is a possible value for x?

Answer 1

17 = x

Answer 2

3x - 4 = 47
Then solve for x:
add 4 to both sides,
3x = 51

then divide by 3

x= 17

Answer 3

I was told that such answer is wrong. I can't figure out why and what the right answer is!

Answer 4

I am staring at it and can't figure out why that would be the wrong answer.

Answer 5

I see what you're saying because the two sides are of unequal length

Answer 6

They are unequal. But, it is an isosceles trepezoid. So, your calculation (same one I am getting) should be right. But, a similar problem I provided an answer to was ruled "wrong". I am torn.

Answer 7

I would assume the answer would be right as well. let me try to use some trig to see if i can get a different answer

Answer 8

just take cos47 = 16/h solve for h; h= ~21.88

then inv sin( 13/h) = 36.48 degrees.

So set 3x - 4 = 36.48

and x ~ 13.49