AB = 4x DC = 16
AD = y + 4
BC = 2y
Quadrilateral ABCD is a parallelogram if both pairs of opposite sides are congruent. Show that quadrilateral ABCD is a
parallelogram by finding the lengths of the opposite side pairs.
A)
12,4
B)
12.8
16,4
D)
16.8

Ireally need subtract and simplify.(-y^2 – 4y - 8) – (-4y^2 – 6y + 3)show your work, ! i will mark you brainliest but you have to show your work.

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Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?