The graph below shows the solution to a system of inequalities:

solid line joining ordered pairs 0, 3.75 and 15, 0. shade the portion of the graph above the line in the first and second quadrant

which of the following inequalities is modeled by the graph?

x + 4y ≥ 15; y ≥ 0
x − 4y ≥ 15; y ≥ 0
x + 4y ≤ 15; y ≥ 0
−x − 4y ≥ 15; y ≥ 0

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.

no idea how or if it wants you to round, but there are 2.18 students per teacher(if you meant 3 and not 33 it would be 24 students per teach), 11 students per tutor, and you would need 12 tutors for 132 students.