Answer:it’s the first one
Step-by-step explanation:
Answer:
a= 1
b= 3
c=1
d= 2
e=6
f=8
area of a triangle is 1/2bh
1/2 X 15 x 9 = 67.5 square feet
The correct answer is a
30+[10+(3²-4)]
30+[10+(9-4)]
30+[10+5]
30+15
45