Adisk costs 3 more then a tape role bought five disks and two tapes. the total cost was 120

What's the difference between: x≥0 and nonnegative integer. ?

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

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76