Concept explainers
Find the least amount of money in dollars she need to earn in tutoring in that week.
Answer to Problem 77SR
At least $150 amount of money, in dollars, she will have to earn tutoring in that week.
Explanation of Solution
Given:
Each week, Donna earns b dollars babysitting and d dollar tutoring. She saves 10% of what she earns. She wants to save at least $25 in one week. If she earns a total of $100 babysitting in that week, what is the least amount of money, in dollars, she will have to earn tutoring in that week?
Concept Used:
She saves 10% of what she earns.
She wants to save at least $25 in one week.
If she earns a total of $100 babysitting in that week,
Calculation:
She wants to save at least $25 in one week.
If she earns a total of $100 babysitting in that week,
She saves 10 % of the total of $100 babysitting =
Let she needs $d to earn tutoring in that week.
Inequality equation:
Solve for d, the total earnings in tutoring.
Thus, at least $150 amount of money, in dollars, she will have to earn tutoring in that week.
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