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spayn [35]
3 years ago
14

Question 1 of 12, Step 1 of 1

Mathematics
1 answer:
stellarik [79]3 years ago
8 0

Answer:

325 and 375 mph

Step-by-step explanation:

Given :

Distance between plane A and B = 2800

Recall :

Distance = speed * time

Let speed of A = v1

Speed of B = v2

v1 = v2 + 50

Time taken = 4 hours

Distance = speed * time

Total distance = 2800

2800 = v1 * 4 + v2 * 4

2800 = (4v1) + (4v2)

2800 = 4(v2+50) + 4v2

2800 = 4v2 + 200 + 4v2

2800 = 8v2 + 200

2800 - 200 = 8v2

2600 = 8v2

v2 = 2600/8

v2 = 325 mph

v1 = v2 + 50

v1 = 325 + 50

v1 = 375 mph

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Answer:

3/50

Step-by-step explanation:

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P(draw a black) = 6/20 = 3/10

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P(draw a blue) = 4/20 = 1/5

P(draw a black and blue with replacement) = (3/10)(1/5) = 3/50

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Step by step explanation
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malfutka [58]

Answer:

B

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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