What is the mean out of 20,12,29,49

Graph the equation 15x - 5y = 30.

In parallelogram MATH, m = (3x + 20) and t = (5x-4) find A

Mr. Ledger buys a box of 24 donuts for a lesson in his math class about circumference. Write an equation for the number of donuts y that are left at the end of the day when x donuts are used during the lesson.

A research team aboard an underwater research vessel descends 800 feet below sea level. They then rise 480 feet before descending again 240 feet.

David read 40 pages of book in 5 minutes. How many pages will he read in 80 minutes if he reads at a constant rate?

If you add 0.43 to a certain number then subtract 0.58 from the result and then another 4.04, you'll get 30.3. What is the certain number?

Suppose that a person won the Florida lottery and was offered a choice of two prizes: (1) sure $500,000 or (2) a coin-toss gamble in which he or she would get $1 million if a head were flipped and zero if a tail.

An item is regularly priced at $69. David bought it at a discount of 55% off the regular price. How much did David pay?

Jim owns a restaurant on the edge of a canyon. He wants to install a cable car over the canyon. He needs to know the width of the canyon.

If you travel 60 miles at 60 miles per hour, how many minutes will that take you? (include unit!)