To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)

c(c - z)
1(-2)(-2 - 9)
1(-2)(-11)
(-2)(-11)
22

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.

2y + 3 > \( \frac{y}{-4} \)
-4 x (2y + 3) > y
(-4 x 2y) + (-4 x 3) > y
-8y - 12 > y
-8y - 12 - y > 0
-8y - y > 12
-9y > 12
y > \( \frac{12}{-9} \)
y > -1\(\frac{1}{3}\)

A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).

The area of a rectangle is equal to its length x width:

a = l x w
a = a x b
a = 1 x 2
a = 2

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)(4ab) + (9a²)(2b)
(3 x 4)(a x a x b) + (9 x 2)(a² x b)
(12)(a¹⁺¹ x b) + (18)(a²b)
12a²b + 18a²b
30a²b