3(2)-18=-12
6-18 = -12
-12 = -12
Answer:
About 38.48ft
Step-by-step explanation:
A=

A=

A≈38.48
first speed --- x mph
return speed -- x+16 mph
6/x + 6/(x+16) = 1
times each term by x(x+16)
6(x+16) + 6x = x(x+16)
x^2 + 4x - 96 = 0
(x-8)(x+12) = 0
x = 8 or x is a negative
her first speed was 8 mph
her return speed was 24 mph
check:
6/8 + 6/24 = 1 , that's good!
The decimal conversion to 8 39/40 is 8.975 and the decimal terminates.