Answer:
$14.69 rounded to the nearest cent would be $14.70, so you muitiply 13.86 x 6 percent which gives you 0.8316, so you take that and add it back to 13.86
5y-10x=35 would be what I recommend
E(x) = A(x) - S(x) = 2400x + 40x^2 - (250x + 500) = 2400x + 40x^2 - 250x - 500 = 40x^2 + 2150x - 500
Ashton's expenses for 3 years E(3) = 40(3)^2 + 2150(3) - 500 = 40(9) + 6450 - 500 = 360 + 5950 = $6,310