Peter’s salary is twice Ann’s salary and half of David’s salary. Then the average salary of Ann and David is Peter’s salary.

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2