Urgent Please Help <3 1."Y varies directly as x". If y = 3 when x = 24, find y when x = 10.

2."Y varies directly as x". If y = 2 when x = 10, find x when y = 7.

3.If y varies directly with x, and y = 8 when x = -4, what is x when y = -48?

4.If y varies directly with x, and y = -20 when x = 3, what is y when x = 15?

5.The cost of bottles of vitamins varies directly with the number of vitamin tablets in a bottle. A bottle of 50 vitamin tablets costs $12. What is the cost in dollars of a bottle of 75 vitamin tablets?