Explain how you can write 5/6 as a product of a unit fraction

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.