An advertisement for a grocery store specifies that you can buy 16 cups of orange juice for $5.60. Which of these are equivalent prices? Check all that apply. 2 cups for $0.70
4 cups for $1.60
8 cups for $2.80
10 cups for $3.00
18 cups for $6.30
20 cups for $7.00

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries

If f(x)=x+7 and g(x)=1/x what is (fog)(x)