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

z² + 6z + 5 = 0
(z + 1)(z + 5) = 0

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

If (z + 1) = 0, z must equal -1
If (z + 5) = 0, z must equal -5

So the solution is that z = -1 or -5

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.

-9x - 9 > -6 - 6x
-9x > -6 - 6x + 9
-9x + 6x > -6 + 9
-3x > 3
x > \( \frac{3}{-3} \)
x > -1

The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):

sa = 2lw + 2wh + 2lh
sa = (2 x 5 x 2) + (2 x 2 x 7) + (2 x 5 x 7)
sa = (20) + (28) + (70)
sa = 118

For parallel lines with a transversal, the following relationships apply:

• angles in the same position on different parallel lines equal each other (a° = w°, b° = x°, c° = z°, d° = y°)
• alternate interior angles are equal (a° = z°, b° = y°, c° = w°, d° = x°)
• all acute angles (a° = c° = w° = z°) and all obtuse angles (b° = d° = x° = y°) equal each other
• same-side interior angles are supplementary and add up to 180° (e.g. a° + d° = 180°, d° + c° = 180°)

Applying these relationships starting with z° = 40, the value of c° is 40.

A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.