Tennis balls cost 7$ for a can of 3. Steve gives the cashier $40 to buy balls and receives $12 in change. How many tennis balls did Steve buy?

On a farm, 1/3 of the livestock is clowns, 1/6 is sheep, 1/4 is chickens and the remainder is horses. Express how many horses there are on the farm as a fraction.

27.3 = 3/4y what does y equal?

A stack of books is 5 feet and 10 inches high. How high is it in inches?

Six less than twice what number is 48?

2 1/2 of ribbon cost 15$ how much per yard

What is the answer for 2x - (x+10) = 45

The volume of one of the Great Lakes is 3.5 * 10^3 cubic kilometers. If there are 6.3 * 10^7 fish in the lake, what is the average number of fish per cubic kilometer?

An old billionaire is writing his will, and deciding how to distribute his nine estates among his three children. He wants to give each child at least one estate, and he does not want to give any two of his children the same number of estates.

You drive an average of 300 miles per week in a vehicle that gets only 14 miles per gallon overall. with the cost of gasoline at $3.

F (x) = 9 sin (x) + cot (x), - π ≤ x ≤ π find the interval of increase.