Question

An electronics store makes a profit of $25 for every portable DVD player sold and $55 for every DVD recorder sold. The manager’s target is to make at least $225 a day on sales of the portable DVD players and DVD recorders. Write an inequality that represents the number of both kinds of DVD players that can be sold to reach or beat the sales target. Let p represent the number of portable DVD players and r represent the number of DVD recorders.

Answer 1

$25 for every portable DVD sold
let p be portable DVD, then the total profit for selling p numbers of portable DVD is given by 25p

$55 for every DVD recorder sold
let r be DVD recorder, then the total profit for selling r numbers of DVD recorder is given by 55r

We want at the minimum a profit of $225 a day, so we want 25p + 55r to be at least 225

The inequality is 25p + 55r ≥ 225