15. If the point (5,k) lies on the line represented by the equation 2x + y = 9, the value of k is C) -1
D) -2
A and B where wrong. 15 points for whomever answers correctly

The answer is C.

Step-by-step explanation:

Given that (5,k) lies on the line that has the equation of 2x + y = 9. So in order to find k, you have to substitute the coordinates into the equation :

Let x = 5,

Let y = k,

On Imagine math, It is the very first choice, with the 1 at the top and then the 2 and the 3, then the 4 and 5 and 6. Hope this helped!

Step-by-step explanation: