X+100+(X+12)=180. solve for x

Aglass triangular prism for a telescope is 5.5 inches long. each side of the prism's triangular bases is 4 inches long and 3 inches high. how much glass covers the surface of the prism? the answer choices are: 75, 76, 77, and 78. this is due tomorrow morning,

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Simone claims the initial value and y-intercept are the same thing on a graph. is she correct? if you know that a line has a slope of and a y-intercept of 7, what is the equation for that line in slope-intercept form?