Three bells ring at the interval of 20 minutes, 30 minutes and 40 minutes. when will they ring together if they ring together at 9: 45 am? plz answer the question

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?

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking/show your work: