If 7 key chains cost $55.65, then 12 key chains cost $

Susie has twice as many dimes and nickels, this amounts to $1.85. How many of each coin does she have?

A coach asked two players how much water they drank before practice. Ashley said she drank 1/2 pint and Claire said she drank 0.7 pint. How many pints of water did Ashley and Claire drink combined?

You have 10 liters of a juice blend that is 60% juice. How many liters of pure juice need to be added in order to make a blend that is 75% juice?

R to he car dealer pays $10,000 for a car. They mark it up 40%

What is 3/8 of 14.5 miles

Can 5x-4+9 be simplified

Each set of ordered pairs represents a function. Write a rule that represents the function (0, 1) (1,3) (2,9) (3,27) (4,81)

Twenty milligrams of the drug lincomycin is to be given for each kilogram of a person's weight. The drug is to be mixed with 250 cc of a normal saline solution, and the mixture is to be administered intravenously over a 1 hour period.

In the diagram below, QRS is an equilateral triangle and RT QS.

What is the solution of this system of linear equations? y=2x-3 2x=y-3 a. infinitely many solutions b. (0, - 3) c. (0,0) d. no solution