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.

(7a)(9ab) + (5a²)(6b)
(7 x 9)(a x a x b) + (5 x 6)(a² x b)
(63)(a¹⁺¹ x b) + (30)(a²b)
63a²b + 30a²b
93a²b

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.

4a + 8a = 12a

The entire length of this line is represented by AD which is AB + BD:

AD = AB + BD

The slope-intercept equation for a line is y = mx + b where m is the slope and b is the y-intercept of the line. From the graph, you can see that the y-intercept (the y-value from the point where the line crosses the y-axis) is 1. The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, 6) and (2, -4) so the slope becomes:

Plugging these values into the slope-intercept equation:

y = -2\(\frac{1}{2}\)x + 1

A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.