A steamer going downstream traveled the distance between two ports in 3 hours. The return trip took 3 hours 40 minutes. Find the
1 answer:
Answer:
1.8 mph
Step-by-step explanation:
Speed of the steamer in still water is 18 mph.
Speed of the current = x mph.
1. The steamer going downstream traveled the distance between two ports in 3 hours. Traveling downstream the current "helps" the steamer, then the speed is 18 + x mph.
The distance traveled downstream = 3(18 + x) miles.
2. The steamer going upstream traveled the distance between two ports in 3 hours 40 minutes that is hours. Traveling upstream the current "interferes" the steamer, then the speed is 18 - x mph.
The distance traveled upstream miles.
3. The distances are the same, so
Solve this equation:
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Answer:
see explanation
Step-by-step explanation:
For the ellipse
+
= 1
Then the vertices are (a, 0), (- a, 0) and (0, b), (0, - b)
Given
+
= 1
Then
a² = 4 ⇒ a = 2 and b² = 100 ⇒ b = 10
Hence the vertices are
(2, 0), (- 2, 0) and (0, 10), (0, - 10)
Answer:
Step-by-step explanation:
<u>Question 1</u>
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To evaluate , replace 75 with (5 × 5 × 3):
Substitute the given values to solve:
<u>Question 2</u>
Given:
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