Answer:
Step-by-step explanation:
Let he speed of the boat on the lake is x.
<u>Considering the speed of the current it will take him:</u>
- 22.5/(x + 6) + 22.5/(x - 6) = 9
- 2.5 / (x + 6) + 2.5 / (x - 6) = 1
- 2.5(x - 6 + x + 6) = (x + 6)(x - 6)
- 2.5*2x = x² - 36
- x² - 5x - 36 = 0
- x = (5 ± √(5² + 4*36))/2 = (5 ± 13) / 2
- x = (5 + 13)/2 = 9 mph (negative root is discarded as the speed should be positive)
The answer is negative 5 because you subtract 12 from each side to get 5x=-25 and -25 divided by 5 is negative 5
Answer:
The answer would be b.
Step-by-step explanation:
We can easily use process of elimination here. a would not be correct because it's saying that as you move forward, you increase when it's the total opposite. You are decreasing as you move forward.
C and D would not be correct because they both are talking about 0 temperature, and there is no data for that temperature.
So B is the correct answer.
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Answer:
ANSWER D IS THE OPTION
Step-by-step explanation:
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