30 students could of been taking both courses and 60 with no course
First write the equations in the slope-intercept form:

Line 1 passes through the points (-6,-6) and (-4,-3).

Line 2 passes through the points (0,3) and (2,6).

These are two identical lines so the system of equations has infinitely many solutions. The answer is D.
Answer:
Step-by-step explanation:
It took 12 days for all the 60 gallons of water to leak out of the barrel. If you divide 60 by 5 you will get 12.
Answer:
(-5/2 , 2)
Step-by-step explanation:
add the two x coordinates of the endpoints and divide by 2. Do the same for the y coordinates.