Miguel and maria are washing the windows in their home. together, they can complete the task in 1 hours. if maria can wash windows twice as fast as miguel, how many minutes would it take her to wash them by herself? in your answer, include the equation you used to solve the problem.

Let's correct what the person above said. 1 and a half hour = 90 minutes.

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 = 90

y = (1/2) x

Solving the system we have:

x = 60 minutes

y = 30 minutes

(Verify:)

30 + 60 = 90

90 = 90 (correct)

it take her to wash them by herself about:

y = 30 minutes

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.