Question

write a function rule for the area of a triangle with a base of 2 m less than 4 times its height. what is the area of the triangle when its height is 8 m?

Answer 1

a=1/2bh

b=4h-2

sub that for b
a=(1/2)(4h-2)(h)
a=(2h-1)(h)
a=2h²-h

a(h)=2h²-h

a(8)=2(8)²-8
a(8)=2(64)-8
a(8)=128-8
a(8)=120m²