For the following system, use the second equation to make a substitution for x in the first equation.

3x + 2y = 7

x - y + 3 = 0

What is the resulting equation?

Compute the unit rate. Choose all that are correct. 1 2 mile in each 1 4 hour is a rate of 1 8 miles per hour. 1 2 mile in each 1 8 hour is a rate of 4 miles per hour. 1 5 mile in each 1 10 hour is a rate of 2 miles per hour.

Clarita is a single taxpayer with two dependent children, ages 10 and 12. Clarita pays $3,000 in qualified child care expenses during the year.

480 calories in an 9 ounce serving. What is the unit rate in simplest form?

A number tripled and tripled again is 810. What is the number? Show your work.

The businessman finds when he produces 10 items, his cost is $200, when he produces 20 items his cost is $250. Find his marginal cost

In how many ways can three automobiles be aligned if they are parked in a row in a parking lot

What is 7/8 of a hour subtracted by 1/5 of 7/8 of a hour?

38) What is 2 1 4 · 9 5? A) 1 1/4 B) 1 5/12 C) 3 17/20 D) 4 1 / 20

Sam built a fence that was 54 / text { feet}54 feet54, start text, space, f, e, e, t, end text long. She built the same length of fence each day for 666 days. How many inches of fence did Sam build each day?

A hose fills a hot tub at a rate of 3.81 gallons per minute. How many hours will it take to fill a 274 -gallon hot tub?