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Kobotan [32]
3 years ago
9

A car covered a certain distance at a speed of 24 mph. While returning, the car covered the same distance at a speed of 16 mph.

What was the average speed of the car for the entire journey? \
Mathematics
1 answer:
Ymorist [56]3 years ago
7 0

Answer:

19.2 mph

Step-by-step explanation:

just trust me

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Please see the attached pictures for full solution.

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4 over 3 devided by 2?
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2/3 or 2 over 3

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4 over three means 4 pieces out of 3. 4 pieces divided by 2 is 2 pieces.

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Need help with 3 and 4 consumer math plz
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Answer:

3) C) $792.50

4) D) $707.50

Step-by-step explanation:

3) Home price = $ 253,600

Mortgage rate = 3.75% APR

Therefore, monthly rate = 3.75% divide by 12

= 0.0375/12

= 0.003125

1st month interest = principle * 0.003125

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3) Answer: $792.50

4) You paid $1500

The first monthly interest = $792.50

Principal paid in the first month = 1500 - 792.50

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Answer: D) $707.50

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6 0
3 years ago
Recently, TWA reported an on-time arrival rate of 78.4%. Assume that a later random sample of 750 flights results in 630 that ar
WINSTONCH [101]

Answer:

Step-by-step explanation:

1. Null hypothesis: u <= 0.784

Alternative hypothesis: u > 0.784

2. Find the test statistics: z using the one sample proportion test. First we have to find the standard deviation

Using the formula

sd = √[{P (1-P)}/n]

Where P = 0.84 and n = 750

sd =√[{0.84( 1- 0.84)/750]}

sd=√(0.84 (0.16) /750)

SD =√(0.1344/750)

sd = √0.0001792

sd = 0.013

Then using this we can find z

z = (p - P) / sd

z = (0.84-0.784) / 0.013

z =(0.056/0.013)

z = 4.3077

3. Find the p value and use it to make conclusions...

The p value at 0.02 level of significance for a one tailed test with 4.3077 as z score and using a p value calculator is 0.000008254.

4. Conclusions: the results is significant at 0.02 level of significance suck that we can conclude that its on-time arrival rate is now higher than 78.4%.

5 0
3 years ago
A triangle has side lengths of 39, 80, and<br> 87. Is this triangle a right triangle?
iren2701 [21]

Answer:

Step-by-step explanation:

39²=1521

80²=6400

39²+80²=1521+6400=7921

87²=7569

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so it is not aright angled triangle.

4 0
2 years ago
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