Sheldon wants to buy a laptop that costs $ 450 from an electronics store . He has two coupons to choose from coupon A which gives him a $ 80 discount and coupon B which gives him a discount of 20.5 % off . Which coupon gives him the better buy ?

Coupon B

Step-by-step explanation:

Given

Required

Which coupon is better

From the question, we have:

Coupon B means that:

By comparison:

Coupon B gives him a better buy because:

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.