First, solve for \( \left|x + 0\right| \):

\( \left|x + 0\right| \) - 3 = 8
\( \left|x + 0\right| \) = 8 + 3
\( \left|x + 0\right| \) = 11

The value inside the absolute value brackets can be either positive or negative so (x + 0) must equal + 11 or -11 for \( \left|x + 0\right| \) to equal 11:

So, x = -11 or x = 11.

To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so add the coefficients and retain the base and exponent:

-7z⁶ + 4z⁶
(-7 + 4)z⁶
-3z⁶

By buying two shirts, Bob will save $42 x \( \frac{10}{100} \) = \( \frac{$42 x 10}{100} \) = \( \frac{$420}{100} \) = $4.20 on the second shirt.

So, his total cost will be
$42.00 + ($42.00 - $4.20)
$42.00 + $37.80
$79.80

A factor is a positive integer that divides evenly into a given number. For example, the factors of 8 are 1, 2, 4, and 8.

Jennifer scored 80% on the test meaning she earned 80% of the possible points on the test. There were 90 possible points on the test so she earned 90 x 0.8 = 72 points. Each question is worth 3 points so she got \( \frac{72}{3} \) = 24 questions right.