Combine like terms to create an equivalent expression

Which of the following is true for the relation f(x)=2x^2+1

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

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?