Answer:
X=1 Y= -10
Step-by-step explanation:
[tex]Y=-x^{2} -5x-4 equation 1 \\Y=-x^{2} + 9x-18[/tex] equation 2
using equation 1, we substitute in equation 2
We have
[tex]-x^{2} -5x-4 = -x^{2} + 9x-18\\-14x=-14\\x=1\\[/tex]
so, we substitute the X value in equation2
we have>
[tex]y=-(1^{2})+ 9(1)-18)=-10\\y=-10[/tex]
