If the original quantity is 12 and the new quantity is 15, what is the percentage increase​

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle