Find a simple interst paid on a loan of 1,500at a rate of 19% 15 months

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Is a square always, sometimes, or never a parallelogram