Please help me solve this

For a school newspaper article, cienna conducted a survey to find out students’ favorite subjects. she polled all the students in mrs. lopez’s advanced dance class. why is her data likely to be skewed? honors dance students are more likely to enjoy dance than students in the general population, so dance may be overrepresented. cienna should have interviewed all the students in the school to get more accurate data. honors dance students are more likely to enjoy dance than students in the general population, so dance will be underrepresented. cienna should have interviewed only every other student in the class to avoid having too many people.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?