David charges $15 plus $5.50 per hour to mow lawns. Ari charges $12 plus $6.25 per hour to mow lawns. In what situations is Ari's charge greater than or equal to David's charge?

Dylan Nixon 2022-10-27 Answered
David charges $15 plus $5.50 per hour to mow lawns. Ari charges $12 plus $6.25 per hour to mow lawns. In what situations is Ari's charge greater than or equal to David's charge?
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Answers (1)

Jovanni Salinas
Answered 2022-10-28 Author has 18 answers
Let x be the number of hours of lawn mowing for which Ari's charge greater than or equal to David's charge. Then 12 + 6.25 x 15 + 5.5 x or, 6.25 x 5.5 x 15 12 or, 0.75 x 3 or, 3 x 4 3. Now, on multiplying both the sides by 4 3 , we get x 4. Thus, if the lawn mowing hours are 4 or more, then Ari's charge is greater than or equal to David's charge
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