Question

Cesar is planning a 4-day trip to visit his friend at a college in another state. It will cost him $198 for airfare, $56 for local transportation, and $45 per day for food. He has $189 in savings and can earn $35 for each lawn he mows. How many lawns must he mow to have enough money to pay for the trip?

Please explain the answer. Knowing just the answer doesn't help me learn anything.


I appreciate all help!

Answer 1

7 lawns

Explanation:

Let us do this. replace l with lawns mowed and replace day with 4 since the trip is a 4-day trip.

What is 198 + 56?

254.

35l + 189 must be equal to or more than 45(4) + 254.

(45 x 4) + 254 = 180 + 254 = 434

434 - 189 = 245

35l = 245

35/35 = 245/35

l = 7

He has to mow 7 lawns.

Answer 2

7 lawns

Explanation:

Given:

• Airfare = $198
• Transportation = $56
• Food = $45 per day
• Length of trip = 4 days

⇒ Total cost of trip = airfare + transportation + 4 x food

= 198 + 56 + (4 x 45)

= $434

Given:

• Savings = $189

⇒ Amount to make from mowing lawns = total cost of trip - savings

= 434 - 189

= $245

Therefore, he needs to make $245 from mowing lawns to have enough money to pay for the trip.

Given:

• Amount earned per lawn mowed = $35

⇒ number of lawns = amount needed ÷ amount earned per lawn

= 245 ÷ 35

= 7

So he needs to mow 7 lawns to have enough money to pay for the trip.