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Hitman42 [59]
2 years ago
11

If a/4 = b/7, what is the value of (a-b) / b?

Mathematics
2 answers:
DerKrebs [107]2 years ago
8 0
First we will find out the values of a
a/4=b/7
a=4b/7

Now
(a-b)/b
{4b/7-b}/b
(4b-7b)/7b
-3b/7b
-3/7
borishaifa [10]2 years ago
8 0

Answer:

-3/7

Step-by-step explanation:

a/4=b/7

a/b=4/7

(a-b)/b=(3-7)/7

(a-b)/b=-3/7

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Waiting Line Models:Movies tonight is a typical video and dvd movie rental outlet for home-viewing customers. During the weeknig
pentagon [3]

Answer:

  1. Probability [No customers in system] = 0.375
  2. Customers waiting for service = 25/24
  3. Average time customer wait = 1.25/1.5
  4. May be wait
  5. Per customer average time = 1.33 (Approx)

Step-by-step explanation:

Given:

Arrival rate λ = 1.25 min

Mean μ = 2

Computation:

(a) Probability [No customers in system]

Probability [No customers in system] = 1-[λ/μ]

Probability [No customers in system] = 1-[1.25/2]

Probability [No customers in system] = 0.375

(b) Customers waiting for service

Customers waiting for service = λ²/ [μ(μ-λ)]

Customers waiting for service = 1.25²/ [2(2-1.25)]

Customers waiting for service = 25/24

(c) Average time customer wait

Average time customer wait = λ / [μ(μ-λ)]

Average time customer wait = 1.25/ [2(2-1.25)]

Average time customer wait = 1.25/1.5

(d) May be wait because Customers waiting for service = 25/24

(e) Per customer average time

Per customer average time = 1/(μ-λ)

Per customer average time = 1/(2-1.25)

Per customer average time = 1.33 (Approx)

7 0
2 years ago
Please help me with this it’s is urgent
Irina-Kira [14]

Answer:

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4 0
2 years ago
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Yanka [14]

If 24 is a solutoin of x, n has to be 24 squared. 24*24=576

6 0
2 years ago
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Karen planted a flower that was 14 inches tall. It grew 2 1/4 inches each week. If it is now 23 inches tall, how
NARA [144]

Answer:

4 weeks

Step-by-step explanation:

2 1/4 = 9/4 = 2.25

if it grows 2.25 inches in one week then in two weeks it would have grown 4.5 inches

keep adding the 2.25 inches to 14 until u get 23

:) hope this was heplful

8 0
2 years ago
Which of the following is a benefit of increasing the sample size when trying to estimate the mean from a sample average?
andrezito [222]

Answer:

Step-by-step explanation:

The larger the sample size, the lower the standard deviation. The standard deviation shows how the data is spread from the mean. Therefore, benefit of increasing the sample size when trying to estimate the mean from a sample average are

a. A reduction in the bias of the estimate.

b. A reduction in the variability of the estimate.

The width of confidence interval is determined by the margin of error

Margin of error = z × s/√n

A smaller standard deviation and increased size would result to a narrower confidence interval. Therefore, increasing the sample size does not result to an increase in the width of the resulting confidence interval.

3 0
3 years ago
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