Three different hoses, each with its own pump, can be used to fill a swimming pool. If hose A is used by itself, the pool takes 6 h to fill. If hose B is used by itself, the pool takes 3 h to fill. If hose C is used by itself, it takes 2 h to fill. If all three hoses are used at the same time, how long does the pool take to fill? Explain your reasoning.

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Agroup of randomly selected apple valley high school students were asked to pick their favorite gym class. the table below shows the results of the survey. there are 528 students at apple valley high school. gym class number of students racquet sports 1 team sports 9 track and field 17 bowling 13 based on the data, what is the most reasonable estimate for the number of students at apple valley high school whose favorite gym class is bowling? choose 1 answer a. 9 b. 13 c. 119 d. 172

If mary had 320 toy cars and she gave her friend 50 cars and then she gave her brother 72 more cars how much toy cars would mary have left ● explain with proper details