Can 9+10 really equal 21 explain and show your work

My number has a tens digit that is more than the ones digit. zero is not one of my digits. what number am i

Simplify the expression. (2x/9 + 8) - 8

An oil storage tank ruptures at time t = 0 and oil leaks from the tank at a rate of r (t) = 80e-0.05t liters per minute. How much oil leaks out during the first hour? (Round your answer to the nearest liter.)

The area of a rectangle is 3/5 square meter. The width is 2/5 meter. What is the length of the rectangle

Square root 8 (square root 2+2)

If p (x) = 2x^2-4 and q (x) = x-3, what is (poq) (x)

For his long distance phone service, Eric pays a $7 monthly fee plus 7 cente per minute. Last month, Eric's long distance bill was $19.04. For how many minutes was Eric billed?

Find the product of the complex number and its conjugate. 3 + 3i

If the general term of a sequence is 4 then the sequence is

How many solutions does this system have? y = 5x + 6 y - 5x = 7 A. no solutions B. 1 solution C. 2 solutions D. infinitely many solutions