A) The profit he made from the sales is expressed as; 20(35) + 15(15) - 125
B) The way I know the expression in A above is correct is because the formula for profit is; Profit = Selling Price - Cost Price
C) Profit = $350
How to solve algebra word problems?
We are told that;
Selling price of each keyboard = $35
Selling price of each charger = $15
A) Now, we are told that he bought 20 keyboards and 15 chargers for a total of $125. Thus;
The profit he made from the sales is;
20(35) + 15(15) - 125
B) The way I know the expression in A above is correct is because the formula for profit is;
Profit = Selling Price - Cost Price
C) The profit made is;
20(35) + 15(15) - 125 = 700 - 225 - 125 = $350
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