The equations of four lines are given. Identify which lines are perpendicular. Line 1: y=−1
Line 2: y=−12x−2
Line 3: x=−4
Line 4: y+3=2(x−2)

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

You have a square piece of cardboard that measures 14 inches on each side. to build a box, you cut congruent squares out of each corner of the cardboard. use the picture to find the area of the cardboard you were used to build the box

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b