You add 70 + 50 then you multiply it by 7.5 and you get, 900 gallons.
3,500 (.024) = 84
84 (5) = $420 in simple interest
Since the area of a triangle is in the form
area=0.5(base)(height)
height=base+7
let base=x
area=0.5(x)(7+x)
30=3.5x+0.5x^2
multiply the equation by 2
60=7x+x^2
subtract 60 from both sides
x^2+7x-60=0
(x-5)(x+12)=0
thus x=5 or x=-12 since we are only considering positive answers
x=-12 is rejected
so base=5 and height=5+7=12
Answer:
7.5in
Step-by-step explanation:
