3a + b = 225

b = a - 15

Donald has a coin collection. He has 36 dimes, 72 quarters, and 18 nickels. He wants to arrange them into equal groups with only one type of coin in each group. How many can he put in each group? a. 1 b. 2 c. 3 d. 4 E. 9 F. 12

In Sean's fish tank there 6 times as many goldfish as guppies there are a total of 21 fish in the tank. how many more goldfish are there then guppies?

Which number should each side of the equation 2/3x=10 be multiplied by to produce the equivalent equation of x = 15? -2/3 1/3 3/2 3

A scalene triangle has side side lengths of 12 feet, 8 feet, and 15 feet. what is the perimeter of the triangle

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Hi friends. Solve 6 11/12 - (24 1/6 + 3 2/3). Do the operation in parentheses first. Show all your steps.

What methods do stock analysts use to value an asset if they calculate profit minus the cost of capital?

Eli bought 2/5 of a crate of fruit and Jared bought 1/10 less of the crate than eli. How much of the crate did they buy altogether?

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R+12 1) add 12 to a number 2) a number plus 12 3) the sum of a number and 12 4) 12 more than a number 5) a number increased by 12