Anatural number is a whole number sometimes or never true

Evaluate the expression for the given value of the variable 7a - 4a for a =8

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?

Astrid spent $36 on new shoes. this was $12 less than twice what she spent on a new skirt. part a: which equation would solve for how much she spent on the skirt? part b: solve the equation in the workspace provided below. how much did astrid spend on her skirt?