Before the assembly began, only 35 percent of the students were seated. if 91 students were not seated, how many students were there in all?

Find the area of the triangle shown 3 by 6

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.