Question

Anna works at an electronics

store as a salesperson. Anna earns a 5% commission a
the total dollar amount of all
phone sales she makes, and earns a 7% commission Or
all computer sales. Anna made a total of $2100 in sales
and earned $119 in
commission. Write a system of equations that could be used to determine the dollar
amount of phone sales Anna made and the dollar amount of computer sales she
made. Define the variables that you use to write the system.
Let

Answer 1

Let p be the amount of sales (in dollars) of phones.

Let c be the amount of sales (in dollars) of computers.

Equation 1: sales

p + c = 2100

the amount of all sales is 2100

Equation 2: commission

0.05p + 0.07c = 119

5% commission on phones plus 7% commission on computers totals to 119