Step-by-step explanation:
Since, y varies directly as x:

Answer:
2.5
Step-by-step explanation:
when you 5x automatically cancels, and 7.5 / 3 is 2.5
Answer:
there are 15 marbles in the bag
Step-by-step explanation:
Answer:
With probability you can multiply your chances in this case.
Getting an odd number: 1/2
Getting a number greater than 4: 1/6
Therefore it is a 1/12 chance to be both odd and greater than 4