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DIA [1.3K]
3 years ago
15

If three riders travel for 3.5 hours at the same speed as their last ride, how many total miles will the 3 refers travel altoget

her
Mathematics
2 answers:
3241004551 [841]3 years ago
6 0

Solution:

Let speed of each rider = x miles/hour

Total time of travel = 3.5 hours

Keep in mind the relation between , distance , speed and time.

Distance = Speed × Time

Distance traveled by first rider = 3.5 × x = 3.5 x miles

Total distance traveled by three riders when they travel alone for 3.5 hours at the speed of x miles per hour= 3.5 x + 3.5 x+3.5 x= 10.5 x miles

When the three refers travel altogether , if the speed of each traveler is x miles per hour for 3.5 hours= 3.5 x miles, where x is speed of each traveler.


Molodets [167]3 years ago
3 0
If you multiply (•) 3.5 and 3 it equals 10.5, so then you multiply it by 3 times and your answer is 31.5 mph altogether
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The dilation is an enlargement

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he XO Group Inc. conducted a survey of brides and grooms married in the United States and found that the average cost of a weddi
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Answer:

A. P(X<20,000) = 0.0392

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Step-by-step explanation:

From XO group website

Cost of a wedding = $29,858

Mean, μ = $29,858

Standard Deviation, σ =$5,600

a. Calculating the probability that a wedding costs less than $20,000

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First, the z value needs to be calculated.

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z = (20,000 - 29,858)/5600

z = -1.76

So, P(X<20,000) = P(Z<-1.76)

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P(Z<-1.76) = 0.0392

P(X<20,000) = 0.0392

b. Calculating the probability that a wedding costs between $20,000 and $30,000

P(20,000 < x < 30,000)

First, the z value needs to be calculated.

z = (x - μ)/σ

When x = 20,000

z = (20,000 - 29,858)/5600

z = -1.76

When x = 30,000

z = (30,000 - 29,858)/5600

z = 0.02

P(20,000 < x < 30,000) = P(-1.76 < z <0.02) --- using the z table

P(-1.76 < z <0.02) = 0.508 - 0.0392

P(-1.76 < z <0.02) = 0.4688

P(20,000 < x < 30,000) = 0.488

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x = σz + μ

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z0.05 = 1.645

x = σz + μ becomes

x = 5600 * 1.645 + 29,858

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Amount = $39,070

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Can you construct a triangle that has side lengths 2 yd, 9 yd, and 10 yd?
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