What is the equation in slop-intercept form of the line that passes through the point (-4,7) and is perpendicular y=4x+15

Mr switzer needs to buy new 1-foot tiles to cover his bathroom floor. the floor is 12 feet long and 8 feet wide. each square foot of tile will cost $1.79. in dollars what will be the total cost of the tiles he needs to buy.

Use set builder notation to represent the following set: { -3, -2, -1, 0}

What is a possible solutions of the x> 3?