What model? also it would be 1/2 and 1/3
No, it is an exponential equation. It has an exponent.
3 dimes= 30 cent
4 pennnies= 4
30+4= 34 cents
A. x * .85 = y or .85x = y
B. x - 2 = y
C. (x - 2) * .85 = y or .85(x - 2) = y
D. .85x -2 = y or (x * .85) - 2 = y
E. The discount then the coupon
(2*40%+x*10<span>0%)/(2+x) = 70%; calculate x !</span>