The mean weight of 8 girls is 55kg and the mean weight of a group of boys if 52kg. the mean weight of all the students is 53.2kg. how many boys are there?

Mike has 20 CD's. 20% are rock and 60% are Pop. How many are other Genres? Explain.

2 to one decimal place

X - 1 4 (12 - x) = x + 3 (4 - x) - 2x

How many solutions are there? 3 (2x + 7) = 13 + 4 (x + 2) + 2x

Of the sixth graders in a school, 4/5 play at least one sport. Of those 2/3 play on a team. What fraction of 6th graders play a sport on a team?

A snail travels 3 feet in one hour. In each subsequent hour, the snail travels three-fourths the distance it traveled in the previous hour. How far does the snail travel in 6 hours

A right triangle has legs that are 19 in. and 23 in. What is the area of the triangle

What equation results from completing the square and then factoring x2+4x=12

In two years the value of a car chnaged from 14,000 to 11,200 what is the percent of change

What is the difference 4 1/3 - (-2/3)