Can you please explain how these problems are figured out? This is all the information I was given for each problem. I will be extremely grateful! Thank you!
1. If the ratio of 2x to 5y is 3 to 4, what is the ration of x to y?
2. Pat invested a total of $3000. Part of the money yields 10 percent interest per year, and the rest yields 8 percent interest per year. If the total yearly interest from this investment is $256, how much did Pat invest at 10 percent and how much at 8 percent?
3. Two cars started from the same point and traveled ona straight course in opposite directions for exactly 2 hours, at which time they were 208 miles apart. If one car traveled, on average, 8 miles pere hour faster than the other car, what was the average speed for each car for the 2 hour trip?
4. A group can charter a particular aircraft at a fixed total cost. If 36 people charter the aircraft rather than 40 people, then the cost per person is greater by $12. What is the cost per person if 40 people charter the aircraft?