Write the expanded form for 72,921

2 to the power of x plus 2 to the power of negative x equals 5/2

You run the length of a 100-yard football field, as well as the 2 end zones that are 10 yards each. It takes you 40 seconds to run the entire distance. How many yards per second do you run?

Lamar must choose a number between 67 and 113 that is a multiple of 4,5 and 8

Simplify - 2x ^3y • xy^2

Which side lengths represent the sides of a right triangle? A) 2, 3, 5 B) 7, 24, 25 C) 7, 23, 25 D) 12, 16, 21

If a truck gets 14 mile to the gallon on average, how much does carbon dioxide is emitted into the atmosphere when the truck travels at 200 miles?

5x-5 + (6y-4) + 4x+10=180

A car went 120 miles in 3 hours. At this rate how long will it take for the car to travel in 350 miles

If you have a test average of 92 and a standard deviation of 1.8, you generally do well on test. true or false

Karla went shopping and bought a dress for 5 1/2 dollars and a skirt for 2 3/5 dollars / If she paid for the clothes with a $20. how much money did she have left? how do I solve the problem using an equation or model