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3 years ago

15

ABCD is a parallelogram. If AB =3x+4, and CD =4x-1, find the length of AB

2 answers:

galina1969 [7]3 years ago

8 0

I go to Connections Academy to. It sucks!

RSB [31]3 years ago

7 0

If AB = CD, then 3x+4 is equal to 4x-1

3x + 4 = 4x - 1
Add one to both sides to cancel out.
3x + 5 = 4x
Subtract 3x from both sides to cancel out.
5 = x

Now, substitute the 5 in place of the x in the equation for AB (3x+4)

3(5) + 4
15 + 4
19

Final Answer: B) 19

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