Determine the type and degree of each of the following polynomial expressions.
9x^4y^9
x^4 - 3x^2 + 7x^5
19a^6b^2 + 8ab^3c - 27a^7

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

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