At dinner one night Sean paid a total of $54.32. The tax was 8%, and he left a 20% tip on the check and tax.

Which equation can be used to find the amount of the check BEFORE tax and tip?

A) x + 0.28x = 54.32
B) 54.32 - 0.8x - 0.20x = x
C) x + 0.08x + 0.20x = 54.32
D) .20(x + 0.08x) + (x + 0.08x) = 54.32

1foot = 12 inches; 1 yard = 3 feet

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2