What is the justification for the step taken from line 2 to line 3?
3x +9-7x = x+10+ x
-4x+9-2x+10
- 6x +9-10
6x=1
x = -1/6

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?

If value of cos330° is √3/2 then find tan165°.

Fast! find the length of cu. the triangles are similar. show your work.