what should be the value of k so that the system of equation has a solution? -x+z-t=3
2x+2y-z-7t=1
4x-y-9z-5t=k
3x-y-8z-6t=1

Which graph represents the solution set for the given system of inequalities? x+2y< 3 x+y> 4 3x-2y> 4

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers