Each marble bag sold by Ghaya's Marble Company contains 7 purple marbles for every 5 yellow marbles. If a bag has 35 yellow marbles, how many purple marbles does it contain?

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?

Maria found the least common multiple of 6 and 15. her work is shown below. multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, . . multiples of 15: 15, 30, 45, 60, . . the least common multiple is 60. what is maria's error?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?