Trevor earns $7.80 an hour take home pay and works 20 hours each week. trevor wants to buy a new laptop computer to take to college that costs $780. how many weeks will it take for trevor to achieve his goal?
a. 4 weeks
b. 5 weeks
c. 6 weeks
d. 7 weeks

b. Trevor needs to work for 5 weeks to achieve his goal

Explanation:

Given

Earnings = $7.80 per hour

Work duration = 20 hour

Cost of laptop = $780

In this question, the relationship between earnings (costs) and work hours is linear; hence, the duration to buy the laptop can be calculated as follows;

His earnings in a week = $7.80 * 20

Weekly Earnings = $156 in a week

To save up to $780; he needs to work for

($780 ÷ $156) weeks

= 5 weeks

Hence, Trevor needs to work for 5 weeks to achieve his goal

you have to put the parentheses like this:

in fact, you have to perform the operation inside parentheses first, and then proceed in order:

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