The number of masthead students increased from 350 to 500 find the percent

the students increased by 42.86%

Step-by-step explanation:

500-350=150

the students increased by 150 students, so the question is 150 is what percentage of 350, and the answer is 42.86%

hope this helps!

X: amount of a spare part of price $74 per unit.

Y: cost of purchasing X spare parts.

Step-by-step explanation:

We can imagine that X represents the amount of an object, for example a car spare part,  which price is $74 per unit.

Then, Y would represent the cost of purchasing X units of that spare part.