Turn 12 decreased by z into an algebraic expression

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

Identify reflection rule on a coordinate plane that verifies that triangle a(-1,7), b(6,5), c(-2,2) and a’(-1,-7), b(6,-5), c’(-2,2) triangle are congruent when reflected over the x-axis