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andrew11 [14]
3 years ago
7

Ram's office is 20 km away from his home. He usually travels by car daily at an average speed of 60 km per hour. On a particular

day, he took 17 minutes to drive from his home to office. What was the average speed for that journey?
Mathematics
1 answer:
Travka [436]3 years ago
8 0
Hello aysha123994 i am sure that it could be 17. if i am wrong forgive me
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20 = x/4 - 13 help plz thank you
murzikaleks [220]

Answer: x = 132 daw

Step-by-step explanation: believe me

4 0
3 years ago
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What method most efficient to use to solve x^2+4x+3=0
Alik [6]
My recommendation would be to factor..
x² + 4x + 3 = 0 factor the left side into two binomials
(x + 3)(x + 1) = 0 set each of these binomials equal to zero and solve

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6 0
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Solve 2(5x + 6) < x - 15 + 9x.​
ipn [44]

Answer:

Hope that was helpful for you! Good luck.

3 0
3 years ago
For which distribution is the median equal to the mean? skewed left uniform skewed right normal
Sati [7]
Skewed left uniform is the answer I think I'm sorry if its wrong.
7 0
3 years ago
A cookie factory monitored the number of broken cookies per pack yesterday.
trapecia [35]

Answer:

Confidence Interval - 2.290 < S < 2.965

Step-by-step explanation:

Complete question

A chocolate chip cookie manufacturing company recorded the number of chocolate chips in a sample of 50 cookies. The mean is 23.33 and the standard deviation is 2.6. Construct a 80% confidence interval estimate of the standard deviation of the numbers of chocolate chips in all such cookies.

Solution

Given  

n=50

x=23.33

s=2.6

Alpha = 1-0.80 = 0.20  

X^2(a/2,n-1) = X^2(0.10, 49) = 63.17

sqrt(63.17) = 7.948

X^2(1 - a/2,n-1) = X^2(0.90, 49) = 37.69

sqrt(37.69) = 6.139

s*sqrt(n-1) = 18.2

s\sqrt{\frac{n-1}{X^2 _{(n-1), \frac{\alpha }{2} } } \leq \sigma \leq s\sqrt{\frac{n-1}{X^2 _{(n-1), 1-\frac{\alpha }{2} } }

confidence interval:

(18.2/7.948) < S < (18.2/6.139)

2.290 < S < 2.965

8 0
3 years ago
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