What is r in this math question - 8=5.5-r

10 times as many as 1 hundred is blank hundred or thousand

Select all ratios equivalent to 20:12 ... 1) 10:6 2) 15:9 3) 3:2

The sixth-graders at Meadowbrook Middle School are going on a field trip. The 325 students and adults will ride in school buses. Each bus holds 48 people. How many school buses are needed? (Do you multiply or divide?)

Chris invests $2,200 into three accounts that pay 6%, 8% and 9% in annual interest. He has three times as much invested at 9% as he does at 6%. If his total interest for the year is $178, how much is invested at each rate?

A spherical scoop of ice cream that has a diameter of 2" is placed on a conical ice cream cone that also has a diameter of 2". If the cone is 5" deep will it hold the ice cream as it melts? Show your work for the sphere: show your work for the cone:

One yard of a ribbon costs 3 1/2 dollars. How much should one pay for 5/8 yards?

Jaidee was going to sell all of her stamp collection to buy a video game. After selling half of them she changed her mind. She bought six more. How many did she start with if she now has 22

A rigth triangle has side length of 6 and 8 find the length of c of the hypotenuse

Solve for x: - a + 3b > 5

Some researchers have noted that adolescents who spend a lot of time playing video or computer games are at greater risk for depression and for violence. This is an example of A.