3x - 7 - 2x + 5 = 6
2 answers:
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Area of a rectangle is length by width, width is x, length is x+8
x×(x+8)=240
x²+8x=240
x²+8x-240=0
Use the quadratic formula to solve
It is a distance so can't be negative, so the answer must be 12
x×(x+8)=240
x²+8x=240
x²+8x-240=0
Use the quadratic formula to solve
It is a distance so can't be negative, so the answer must be 12
Given
When t = 80
We substitute for t
Simplify
Simplify further
The final answer
