Answer:
D 150 sq ft
Step-by-step explanation:
10x12 = 120
1/2(10)(6) = 30
120+30 = 150
Since this is an equilateral traingle, as indicated with the marks on every side, you can set each equation equal to 60.
7x-3=60
7x=63
x=9
Answer:a
Step-by-step explanation: