I'm stuck on a question : e + 1/2 = 9

If 20% of a number is 35, what is 50% of that number?

The square root of 9x plus 7 plus the square rot of 2x equall to 7

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?