Can someone show me how to get the answer of -8 - 12 / (-4) step by step?

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?

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?