Asked by Student

If x and y are positive integers, which of the following could be equal to
3x+ 4y?

The answer is 10, but not sure on how to get the answer? Also, is there a short cut to get to the answer without taking a lot of time on the SAT to work this type of problem out?

Thank you
Answered by PsyDAG
3x + 4y = 10, if x = 2 and y = 1.
Answered by Student
This still isn't clear to me because 0 is a positive integer so I could put x=2 and y=0 and get 3x + 4y= 6. The answer is 10 and the answer choices are:

A-6
B-8
C-9
D-10
E-12