Final answer:
After setting up the equations for both lawn mowing services and equating them, we find that the total cost for Lovely Lawns and Green Grass will be the same after 4 weeks.
Step-by-step explanation:
Sebastian is trying to determine when the total cost of two different lawn mowing services, Lovely Lawns and Green Grass, will be the same. To find this, we must set up an equation based on the information provided:
Lovely Lawns: $20 + $55 per week
Green Grass: $80 + $40 per week
If we let w be the number of weeks, we can express the total costs for each company as follows:
- Lovely Lawns: Total Cost = 20 + 55w
- Green Grass: Total Cost = 80 + 40w
To find out when the costs will be the same, we set the total costs equal to each other:
20 + 55w = 80 + 40w
To solve for w, subtract 40w from both sides:
20 + 15w = 80
Then, subtract 20 from both sides:
15w = 60
Finally, divide both sides by 15 to find the number of weeks:
w = 4
Therefore, after 4 weeks, the total cost for both lawn mowing companies will be the same.