Exercise #2: Consider the expression 5+ x +7. (a) Evaluate this expression for x = 4. What addition does our order of operations insist comes first? Show this.​

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

Solve the triangle. a = 21°, c = 105°, c = 5