I NEED HELP PLEASE, THANKS! What is the formula to find speed of light?

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?

Parallelogram efgh is a rectangle. he = 6, and fe = 8. find ge: and find fj:

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18