What is the first step to simplify this expression, following the order of operations? Perform the step, and show your work. (4x2 + 8x + 15) + (x2 − x − 27) − (x + 5)(x − 7)

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?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Which expression converts 45 degree to radians