Answer:
Caleb and Devon each bowled for
hours and spent
.
Explanation:
Equations:
- Caleb: y = 4x + 15
- Devon: y = 5x + 5
Where:
- x = hours spent bowling
- y = the total cost
System of equations:

Solve for x
Step 1: Substitute the second equation into the first.

Step 2: Subtract
from both sides


Step 3: Subtract
from both sides.


Step 4: Divide both sides by
.


Solve for y
Step 1: Substitute the found
value into one of the system of equations.

Step 2: Multiply and add.


Therefore, Caleb and Devon each bowled for 10 hours and spent $55.