13 + (3+7) = (13+3) + 7 what property is that

How can you make 2 into 3 without adding one? For example (exponents and dividing)

The smallest package weighed only 1/3 more than 1/2 the weight of the heaviest package. If the two packages combined weighed 100 kilograms, how much did the smaller package weigh?

What is the measure of each exterior angle of a regular hexagon?

Which set of ratios below is not equivalent to 3:4? 6 to 9, 9/12 9 to 12, 15/20 15/20, 24:32?

If the original quantity is 8 and the new quantity is 6, what is the percent decrease?

6 5/5 1 1/5 mixed number subtracting

An airliner travels 45 miles in 6 minutes. what is the speed in miles per hour?

Select one or more expressions that together represent all solutions to the equation. Your answer should be in radians Assume n is any integer 13 sin (2x) - 3 = 3

A rubber ball is dropped onto a hard surface from a height of 9 feet, and it bounces up and down. At each bounce it rises to 80% of the height from which it fell. a. Find a formula for h (n), the height in inches reached by the ball on bounce n.

What is 76 times 468