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.

3a x 3b = (3 x 3) (a x b) = 9ab

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.

3a - 7 < \( \frac{a}{-2} \)
-2 x (3a - 7) < a
(-2 x 3a) + (-2 x -7) < a
-6a + 14 < a
-6a + 14 - a < 0
-6a - a < -14
-7a < -14
a < \( \frac{-14}{-7} \)
a < 2

A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.

The area of a triangle is equal to ½ base x height:

a = ½bh
a = ½ x 6 x 9 = \( \frac{54}{2} \) = 27

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

x² - 6x + 5 = 0
(x - 1)(x - 5) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (x - 1) or (x - 5) must equal zero:

If (x - 1) = 0, x must equal 1
If (x - 5) = 0, x must equal 5

So the solution is that x = 1 or 5