Mario and his friends ordered 3 pizzas. each pizza was sliced into 8 pieces. they ate 21 slices. how much pizza did they eat? write your answer as a mixed number.

A eighteen-sided die is rolled three times. In how many ways can this happen?

how many gallons of a 15% sugar solution must be mixed with 5 gallons of a 40% sugar solution to make a 30% sugar solution

What is 7 3/8 - 5 1/6

2) Brenda spent $24 on a magazine and some candy bars. If the magazine cost $3 and each candy bar cost $3, then how many candy bars did she buy?

How many triangles can be constructed with sides measuring 5m, 16m, and 5m

In a certain manufacturing plant, the first operation can be done on any one of five machines, the second operation on only one machine, the third operation on any one of six machines, and the fourth operation on either of two machines.

using the frequency table below find how many students recived a score of 70 or better on a math test

Find the area of the following ellipse Use = 3.14 and round to nearest tenth. a = 8 in.; b = 7 in.

Maria, an experienced shipping clerck, can fill a certain order in 13 hours. Felipe, a new clerck, needs 14 hours to do the same job. Working together, how long will it take them to fill the order?

Which fraction is equal to 1/5