2.998 correct me if wrong
Answer:
Correct choice is D
Step-by-step explanation:
Given the system of two equations:
Fro mthe first equation
Substitute into the second equation instead of y:
Note that then the second equation will take look
It should be d. , Because if you take the equation 3x+y=9, and make it slope intercept form, it would be y= -3x+9. -3 is the slope, and 9 is the y intercept. D is the answer.