Answer:
798
Step-by-step explanation:
first you do 40x20=800 then 800-6=794 then 794+4=798
The answer is B.
I hope this helps!
Answer:
C
Step-by-step explanation:
x+4y=-12
x+7y=-15
subtract
-3y=3
y=-1
x+4(-1)=-12
x=-12+4=-8
so point is (-8,-1)
It is undefined when the denominator is 0
