Question

Let m equal the amount Lakendra has left after buying a radio. Lakendra paid $12 for the radio. Write the expression that represents the amount Lakendra had before she bought the radio.

a)m−12
b)12−m
c)m+12
d)12÷m

Answer 1

The expression that represents the amount Lakendra had before she bought the radio is m + 12, because we add back the cost of the radio to her remaining amount.

Step-by-step explanation:

The expression that represents the amount Lakendra had before she bought the radio is m + 12. This is because to solve for the initial amount Lakendra had, we need to add the amount she spent on the radio to the amount she has left after her purchase. Algebraically, if m is the amount left after spending $12, then the original amount before the purchase would be m plus 12. We do not need to divide 0.40 into both sides of the equation or multiply both sides of the equation by 12 since there is no additional context or equation provided in the question that would require these steps.