Answer:
you'll have to multiply 8 by itself to get your area so you have to do 8*8
Step-by-step explanation:
The formula for area of a triangle is A= bh/2
So 8•5/2 is 40/2= 20
Then 13•19/2 is 247/2= 123.5
All you need to do is substitute.
-3 + 36/9
-3 + 4
= 1
B) 16
8s-4=7s+12
s-4=12
s=16
