8% of 195 is what number

Question 101 points)which equation in slope-intercept form represents the line that passes through (5, 1) and(-4,7)

Solve the system of equations y= 3/2 - 1, -x+ y =-3

Louis wants to carpet the rectangular floor of his basement. the basement has an area of 864 square feet. the width of the basement is 2/3 it's length. what is the length of louis's basement