The two numbers are -51 and 31. Hope it help!
2/10 and 5/25 is your answer :)
x=adult tickets
y=student tickets
(9x+13y=212)*4= 36x+52y=848
(4X+15y=168)*9= 36x+135y=1512
subtract both equations -83y=-664
divide by -83 y=8
student tickets cost $8
Answer:
the third (bottom left) option
Step-by-step explanation:
for every valid value of x there must be exactly one value of y.
the first option is valid only for positive x, but then for every valid x there are always 2 possible y values (a positive and a negative one).
the second option is defined for only one value of x (3), but this x has infinitely many y values.
the fourth option is a circle defined for -r <= x <= r (r being the radius). in this defined interval almost every x has 2 assigned y values (only x = -r and x = r have one y value).