Can somone please help me and explain very much appreciated and this is 7th grade math btw

Write the pair of fractions as a pair of fractions with a common denominator

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

Simplify the following expression 48^1/2