Which pair of equations represents two perpendicular lines?

1. 2x-5y=45 and y-5/2x=-9

2.-3x+2y=10 and 3y=-2x+12

3.7x+4y=20 and y-3 = - 4/7x

4. x=4y+4 and 4x+4y=4

Which term best describes lines that meet at right angles? A: perpendicular B; parallel C; skew D; adjacent

Including a 19% sales tax, a tailored suit costs $357. Find the original cost of the tailored suit. A) Write an equation that can be used to solve this question. Use x as the original cost and express any percentage in decimal form.

Seventy students are graduating in may. They make up 1/5 of the students population, how many students attend the school.

What is the value of - / - 9+-5/-24

Luci cuts a board that is 3/7 yard long into pieces that are 3/14 yard long. How many pieces does she cut?

8x=25-9y - 13x=-35+9y

The area of a rectangle is 35 cm2 what could the length of the 4th sides be

What is the horizontal distance from the plane's starting position to its finishing position? Round your answer to the nearest tenth of a kilometer.

7/8 cup flour 1/8 tsp baking powder 2/8 tsp salt 4/8 cup butter 2 lg eggs 2/8 tsp vanilla extract Racheal needs to triple the recipe for her bake sale. How much of each ingredient does she need now?

How to model the expression (t-9) ?