Letr(x)= x?. If r(x)= 4, find x.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders

It takes an ant farm 3 days to consume 1/2 of an apple. at that rate, in how many days will the ant farm consume 3 apples