Answer:For this case, the first thing we must do is define variables.
x: amount of time Miguel uses to complete the task.
y: amount of time Maria uses to complete the task.
We write the system of equations:
x + y = 60
y = (1/2) x
Solving the system we have:
x = 40 minutes
y = 20 minutes
Answer:
it take her to wash them by herself about:
y = 20 minutes
Step-by-step explanation:
What is your question that your asking?
Y/x = 9/12 = 3/4
so
y = (3/4)x . . . . . . both x and y in dollars.
The unit rate is 12.65 per hour.
