Answer:
8 feet
Step-by-step explanation:
Given data
Area= 64 square feet
Base= x feet
Height= x+8 feet
The expression for the area
A= 1/2b*h
substitute
64= 1/2*x*(x+8)
64= 1/2*x^2+8x
64= (x^2+8x)/2
cross multiply
64*2= x^2+8x
128= x^2+8x
rearrange
x^2+8x-128= 0
using the quadratic formula
a=1
b=8
c=-128
x= -b±√b^2-4ac/2a
x= -1±√8^2-4*1*-128/2*1
simplifying
x= 8
x=-16
Hence the height of the base is
h= 8 feet
5) 2*5
over which equals 10/40 or 1/4
5*8
6)8*3=24
15*10=150 answer is 24/150
7)2*12=24
9*13=117 answer 8/39
8)7*12=84
8*1=8 answer 8 and 1/2 or 84/8
9)4*5=20
12*1=12 answer 1and 2/3 or 20/12
10) 4*4=16
9*9=81 answer 16/81
11)3*7=21
14*9=126 answer 1/6
12)8*24=192
9*11=99 answer 1 and 31/33 or 192/99
The answers are RBR and BBR
Trust me I took the test
