Answer:
Correct choice is D
Step-by-step explanation:
Given the system of two equations:

Fro mthe first equation

Substitute into the second equation
instead of y:

Note that
then the second equation will take look

Post a picture to see the example of point C
Answer:
$150
Step-by-step explanation:
The area of the lawn is 12m so 12 x 12.50 is 150. It would cost $150