Morgan has $28.75 on a gift card. she buys seven cups of coffee and has $20 left write and solve an equation to determine the cost of one cup of coffee.

Step-by-step explanation:

28.75-20=8.75

8.75/7= 1.25

each cup costs $1.25

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square