Could someone please answer this?

Binh says the point of intersections is (0,-3) which statements identify the errors binh made , check all that apply

How can i differentiate this equation?

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13