Answer:
p = 35
Explanation:
the midsegment WY is half the measure of VZ , that is
WY =
VZ ( substitute values )
p - 21 =
(p - 7) ← multiply through by 2 to clear the fraction
2p - 42 = p - 7 ( subtract p from both sides )
p - 42 = - 7 ( add 42 to both sides )
p = 35