Answer:
0.25
Step-by-step explanation:
we have
we know that
substitute
Remember that
so
Answer:
Step-by-step explanation:
The depth function is:
After 3 minutes, a submarine had descended to −320 feet.
This means that . So
After 8 minutes, the submarine had descended to −420 feet.
This means that . So
From the first equation:
So
And
So
Answer:
C) 20, 4
Step-by-step explanation:
X = 5y
2x + 5y = 60
substitute in 5y for x: 2(5y) + 5y = 60
10y + 5y = 60
15y = 60
y = 4
x = 5y
x = 5(4) = 20