The interior angles formed by the sides of a quadrilateral have measures that sum to 360°.
What is the value of x?
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X=

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.