Which equations can be solved to determine the break even point if c(x) represents the cost function r(x) to represents the revenue function and x the number of hours per month the store is open

Geometry ? i don't know how to do any of these.

Write an equation of a line in slope intercept form that is perpendicular to the line 2x -3y = 12 and passes through the point (2, 6).

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1