Answer:
From the level of high tide to low tide, it's 18 feet.
Step-by-step explanation:
To find the change in water level, we multiply the rate (3 ft / hr) by the time (6 hrs), obtaining 18 ft.
The water level changes by 18 ft.
A) (3, 6)
B) (2, 3)
C) (4, 2)
D) (6, 0)
-9
2x + 7 = -11
2x = -11 - 7
2x = -18
x = -9
468