Points a and b both lie on the line y=3x+7. Work out the missing y coordinate for a and the missing x coordinate for B?

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

This is about circle theorems. someone asap : (

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?