30% ofwhat number is 21.3

there are 30 fish in a tank. the fish are either orange or red. there are 12 more orange fish than the number of red fish, how many fish are orange? how many fish are red?

What value of h makes the equation true - 1/8 (2h+4) + 1/2 = - 7/4 h = 7 25/16 7/16 25

The diameter of circle C is 18 cm. Chord AD is the same length as a radius. Use this information, the diagram, and your experiences in geometry this semester to answer these questions. a) what are the measures of the angles BDA and DBA?.

Layla used 0.482 gram of salt in her experiment. Maurice use 0.51 gram of salt. Who used the grater amount of salt?

A plumber charges $65 for a diagnostic check. after the check it is $85 per hour for the work with $320 in your wallet, how many hours of work can you afford?

There are 28 student desks in a class. Each desk measures 26.17 inches. If you were to line up all the desks end to end how long would hey be

Apply the distributive property to write an equivalent expression 21b + 23c

A number cube is rolled 2 times in a row. What is the probability of rolling a 5 both times

8-4r=-2r-5 how can I solve this?

Among all pairs of numbers whose sum is 16 , find a pair whose product is as large as possible. what is the maximum product