Answer:
0 represents the water level.
Step-by-step explanation:
The ring started out at -10 and moved upwards to 0.
x + 2y = 2
x - 2y = -2
2x = 0
x = 0
0 + 2y = 2
2y = 2
y = 1
(0, 1)
consistent and independent
31 + (4*2^2 + 8*2) + (3*2^2 + 5*2 + 20) + (7*2 + 30) = 129
n=0 , m= 13 A
Answer:4