You enter a lottery where you select 5 number from 1 - 30 without duplicating numbers. How many possible combinations of numbers are there?

For what value of (y) is 3^3/3^y =1/9

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

I’m really confused and need your assist me with this question i’ve never been taught