For the equation y=12x + 90 what is the slope

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price