A regular polygon has n sides and interior angles on 160° Find the size of each interior angle in a regular polygon with 4n sides

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

Which system of linear inequalities is represented by the graph?