F(x)=9x^3+2x^2−5x+4 and g(x)=5x^3−7x+4. what is f(x)−g(x)?

please help/ explain!

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?