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For this case we have to:
x: It is the variable that represents the number of compact discs.
The cost function must be found considering that each disk costs $7.13. So:
Thus, to find the total cost of "x" compact discs (in $) we substitute the number of discs in the cost function.
Answer:
Word phrase is a mathematical phrase that is a expression that combines numbers and or/ variables using mathematical operations. Expressions represent a value.
Ex.
Ex.