Question

Kim and ken are trying to earn at least $400 to buy a mountain bike. Kim earns $7 per hour as a youth counselor at camp. Ken earns $5 per hour mowing lawns. Let x = Kim's hours and y = Ken's hours. If ken works 40 hours, what is the least number of hours that ken will need to work to meet their goal?

Answer 1

Answer: 29 Hours of Work

Step-by-step explanation: Let's start by working backwards.. We know that Ken makes 5 dollars an hour, and he worked 40 hours. 5 * 40 = 200, and 400-200 = 200. This means that Kim has to work 200/7 hours, or (approximately) 29 hours of work.