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babunello [35]
3 years ago
15

A train leaves Little Rock Arkansas and travels north at 75 kilometers per hour. Another train leaves at the same time and trave

ls south at 85 kilometers per hour. How long will it take before they are 640 kilometers apart?
Mathematics
1 answer:
Mama L [17]3 years ago
4 0

Answer: it will take them 4 hours to be 640 kilometers apart.

Step-by-step explanation:

Let t represent the time it will take for both trains to be 640 kilometers apart. It means that the total distance that both trains will covered in t hours is 640 kilometers.

Distance = speed × time

A train leaves Little Rock Arkansas and travels north at 75 kilometers per hour. Distance covered after t hours would be 75 × t = 75t

Another train leaves at the same time and travels south at 85 kilometers per hour. Distance covered after t hours would be 85 × t = 85t

Since the total distance covered is 640 kilometers, then

75t + 85t = 640

160t = 649

t = 640/160

t = 4 hours

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Bob earns $2900 per month. 15% of his salary is deducted for his car loan. Which operation do I use?
spayn [35]

Answer:

Results are below.

Step-by-step explanation:

Giving the following information:

Bob earns $2900 per month. 15% of his salary is deducted for his car loan.

F<u>irst, we need to calculate the deduction for the car:</u>

Deduction= 2,900*0.15

Deduction= $435

<u>Now, the monthly salary that remains for Bob:</u>

Montlhy salary= 2,900 - 435

Monthly salary= $2,465

6 0
3 years ago
Find the area of the shaded region. Round your answer to the nearest tenth.
Anestetic [448]

Answer: 2.5 or 2 1/2.

Step-by-step explanation:

3 0
3 years ago
A climber on Mt Everest is 6000 meters from the start of his trail and at elevation 8000 meters above sea level. At x meters fro
sergeinik [125]

Answer:

h'(x) = 0.6 and Δx = 1 and 2

h(6001) = h(6000) + h'(6000)(1) = 8000 +0.6 = 8,000.6

h(6002) = h(6000) + h'(6000)(2) = 8000 + 0.6 (2) =8000 +1.2 = 8001.2

Explanation below:

Step-by-step explanation:

Based on the information given we have that when the climber is 6000 meters from the start, his elevation is 8000 meters above sea level.

We know that the function for elevation is given by h(x) where x is the number of meters from the start.

Therefore, h(6000) = 8000.

We also know that the derivative of a function tells us the reason of change at some point (or how fast a function is changing near that point). For this problem we have that h'(x) = 0.6. (<u>meaning that the elevation increases in 0.6 meters for every meter they hike further nearby the 6000 meters</u>)

We need to use the derivative at a point to estimate values of the function at nearby points

We're going to use h'(x)= 0.6. Δx= 1

h(6001) = h(6000) + h'(6000)(1) = 8000 +0.6 = 8,000.6

Therefore h (6001) = 8,000.6

Now for h'(x)= 0.6. Δx= 1

h(6002) = h(6000) + h'(6000)(2) = 8000 + 0.6 (2) =8000 +1.2 = 8001.2

Therefore h(6002) = 8001.2

6 0
3 years ago
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Llana [10]

Answer:

The product of 16 and 26 would be 16 * 26

Step-by-step explanation:

This is because "the product of" means multiplication so *. Making it 16 * 26.

8 0
3 years ago
Can some one help who actually knows the answer!
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Answer:

well explict means stated clearly and in detail, leaving no room for confusion or doubt. and implict means implied though not plainly expressed.

Step-by-step explanation:

6 0
2 years ago
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