Tommy is twice as old as his younger sister. The sum of the siblings' ages is 21. Which equation can be used to determine the age of Tommy's younger sister?

A land scalpers mows lawns for at least 3 hours but not more than 6 hours the landscaper can mow 44,000 ft per hour the function f (t) =

Which unit of measure would you use to weigh your bike?

Find x 5/7x+1/5x=96 this is two-step equations

Your biking at a speed of 18 miles per hour. Your 3 miles behind your friend, who is biking at a speed of 12 miles per hour. Write and solve an equation to find the amount of time it takes for you to catch up with your friend

What is 0.00000018 in scientific notation

Solve for w - 2/5+1/2w = - 6/7

Liliana takes four breaths Per 10 seconds during yoga at this rate about how many breaths would Liliana take in two minutes of yoga

Which expressions have the same solution as - 4 (6) ? Check all that apply. -4 ( - 6) 4 ( - 6) 6 ( - 4) -8 (2) 12 ( - 2)

A certain type of bacteria, given a favorable growth medium, doubles in population every day. If you begin with 10 bacteria, how many days will it take for the population to reach 20,000

If you wanted to find the depth of a submarine during a dive, would it be more reasonable to use an equation with the rate in feet per minute or feet per hour? Explain your reasoning.