Friendly numbers and mental math

31 feet 8 inches - 3 feet 6 inches =

Rewrite the quadratic equation 2x squared plus 12x plus 1 equal y

Megan is buying a new stove for 499.99. Sales tax is 7.5%. How much will Meagan have to pay in total for the stove? Round your answer to the nearest penny.

An experiment, the temperature fell 48degrees in 8 minutes. If the temperature fell at the same rate every minute. How many degrees did it change each minute?

The graph represents the feasible region for the system: y 30 Minimize the objective function P = 20x + 16y.

Bob won big at bingo last night, he walked away with $800. The first thing Bob does is to take a cab to his mother's house. He gives the cab driver $20 and tells him to keep the change.

A local company wants to evaluate their quality of service by surveying their customers. Their budget limits the number of surveys to 100.

Select the correct numeral form of this number written in scientific notation. 5.0 * 10^10 0.000 000 000 5 5,000,000,000 50,000,000,000 500,000,000,000

John has a bag of marbles that contains 12 red marbles 20 green and 17 blue. if john pulls one marble what is the probability that it will be a purple marble

Solve for x: 2 over 3 (x - 4) = 2x. 2 - 2 - 8 - 4