Simplify: (7x^2 − 5x + 2) − (−3x^2 + 8x − 4)

Given abcd ac=38 and ae=3x+4 find the value of x

Ineed with number 6 , explain how to get 1978

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be able to prepare using the sauce?