Can you guys please help me on 14-17

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint. how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2