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lidiya [134]
3 years ago
14

Marta conducts emissions inspections on cars. She finds that 8 percent of the cars fail the inspection. Let X be the number of c

ars Marta inspects until a car fails an inspection. Assume that the results of each inspection are independent.
Find the mean and standard deviation of X
Mathematics
1 answer:
exis [7]3 years ago
6 0

Answer:

mean - 12.5

SD - 12.0

Step-by-step explanation:

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A banana peel weighs 1/12 of the total weight of a banana. If an unpeeled banana balances a peeled banana of the same​ weight, p
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Answer:

11 ounces

Step-by-step explanation:

Unpeeled = X

Peeled = (1 - 1/12)X = (11/12)X

X = (11/12)X + (11/12)

X - (11/12)X = 11/12

(1/12)X = 11/12

X = 11 ounces

4 0
3 years ago
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Choose the number sentence that shows the identity property of addition. A. 45 = 0 + 45 B. 90 = 45 + 45 C. 46 = 1 + 45
Alik [6]

Answer:

The answer is A

Step-by-step explanation:

The identity property of addition simply states that when you add zero to any number, it equals the number itself.

7 0
4 years ago
7 is subtracted from 7 times a number
PolarNik [594]

Answer:

(7x) - 7

Hope this helps!

8 0
3 years ago
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What is the slope of the line that passes through points (1/4,3) and (5,8)
Alex73 [517]

Answer:

20/19

Step-by-step explanation:

y2-y1/x2-x1

= 8-3/5-1/4

=20/19

8 0
3 years ago
While working at his neighborhood math tutoring center researching the comprehension level of the students Dion investigated tha
elena-14-01-66 [18.8K]

Answer:

Step-by-step explanation:

While working at his neighborhood math tutoring center researching the comprehension level of the students Dion investigated that the distribution of the student test scores are normally distributed with a mean of 79.13 and a standard deviation of 6.34. What is the probability that the student scores less than 60.11

We solve using z score formula

z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation.

z = 60.11 - 79.13/6.34

6 0
3 years ago
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