The volume of a cube is height x length x width:

v = h x l x w
v = 6 x 4 x 1
v = 24

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

z² + 14z + 48 = 0
(z + 6)(z + 8) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (z + 6) or (z + 8) must equal zero:

If (z + 6) = 0, z must equal -6
If (z + 8) = 0, z must equal -8

So the solution is that z = -6 or -8

The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)² : a = π r².

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.

9a - 6a = 3a