To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.

5a - 2a = 3a

To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.

4a x 2b = (4 x 2) (a x b) = 8ab

The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:

c² - 11c + 24 = 0
(c - 3)(c - 8) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (c - 3) or (c - 8) must equal zero:

If (c - 3) = 0, c must equal 3
If (c - 8) = 0, c must equal 8

So the solution is that c = 3 or 8

A trapezoid is a quadrilateral with one set of parallel sides.

To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the < sign and the answer on the other.

3y - 7 < 4 + 2y
3y < 4 + 2y + 7
3y - 2y < 4 + 7
y < 11