Could the points (-4,3), (-1,1) and (1,3) form the vertices of a right triangle? why or why not?

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Nine more than four times a number is the same as one less than twice the number. find the number?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b