Chapter 11.7, Problem 5STP

Tracey wants to buy a house. She needs a salary of $3600 a month to qualify for the mortgage. Tracey works at a bank for $20/h for 160 hours each month. After work, she has a second job at the mall and makes $16/h. How many hours would she have to work at the mall in order to make enough money to qualify for the mortgage? Show your work. .

To determine

To find : how many hour she have to work at the mall in order to make enough money to qualify for the mortgage

Answer to Problem 5STP

She has to work at the mall $25hours$ to make enough money to qualify for the mortgage

Explanation of Solution

Given information : Tracey wants to buy a house. She needs a salary of $\$3600$ a month to qualify for the mortgage. Tracey works at a bank for $\$20/h$ for $160hours$ each month. After work, she has a second job at the mall and makes $\$16/h$

Calculation :

Tracey needs a salary $\$3600$

She works in a bank and earn $\$20/h$

For $160hours$ salary will be $20\times 160=\$3200$

She requires $3600-3200=400$ more

In a second job she earn

  $\$16/h$

  $\begin{array}{l}\$400=\frac{1}{16}\times 400\\ \Rightarrow 25hours\end{array}$