Answer:
The calculator cost $75
Step-by-step explanation:
Let
x ----> the calculator cost
Remember that
[tex]40\%=40\100=0.40[/tex]
we know that
The cost of the calculator multiplied by the percentage saved must be equal to the amount saved by Enrique
so
[tex]0.40x=30[/tex]
solve for x
Divide by 0.40 both sides
[tex]x=\$75[/tex]