You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a² - a² = 3a² but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.

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 2. 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, -1) and (2, 5) so the slope becomes:

Plugging these values into the slope-intercept equation:

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

The first step to solve a quadratic expression that's not set to zero is to solve the equation so that it is set to zero:

z² - 20 = -2z + 4
z² - 20 - 4 = -2z
z² + + 2z - 24 = 0
z² + 2z - 24 = 0

Next, factor the quadratic equation:

z² + 2z - 24 = 0
(z - 4)(z + 6) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (z - 4) or (z + 6) must equal zero:

If (z - 4) = 0, z must equal 4
If (z + 6) = 0, z must equal -6

So the solution is that z = 4 or -6

The formula for area is πr²:

a = πr²
a = π(2²)
a = 4π

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.

8a - 5a = 3a