8 + 3 = −13 Solve for x

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges

Y+ 2/y is it a polynomial in one variable or not? and if so, why?

In 1995 america online had about 3000000 users over the next decade users are expected to increase from a few million to the tens of millions suppose the number of users increased by 150% by the year 2000 how many users will there be in the year 2000