Rosa earns $12 per hour. in 7.5 hours, she will earn x dollars. which is a valid proportion that can be used to solve the problem?

Step-by-step explanation:

We have been given that Rosa earns $12 per hour. We can represent this information as:

We are also told that in 7.5 hours, she will earn x dollars. We can represent this information as:

Since proportion states that two quantities are equal, so we can set a proportion for our given quantities as:

Therefore, the proportion can be used to solve the problem.

Let us solve for x.

Therefore, the value of x is $90.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.