I need help- due by tonight ;-; (only need to do 1-4 pls)

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?

What is the area of a triangle with a base of 15 inches and a height of 4 inches? a. 15 square inchesb. 30 square inchesc. 60 square inchesd. none of the above