Answer:
P=4.5
Step-by-step explanation:
Area of DFH is area of GFD minus area of GHD.
Area of GHD:
GH^2=5^2-3^2=16
GH=4
P1=4*3/2=6
Area of GFD:
P2=7*3/2=10.5
Area of DFH
P=P2-P1=10.5-6=4.5
x≥3
7x-28≥-7
Add 28 to each side
7x-28+28≥-7+28
7x≥21
Divide by 7
7x/7≥21/7
28900
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