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erma4kov [3.2K]
3 years ago
12

Is there any one who can do most of these questions pls and thank you

Mathematics
1 answer:
KonstantinChe [14]3 years ago
4 0

Answer:

#6 is x=9 #8 is x=-2 #10 is x=8 #12 is x=-1

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givi [52]

Answer:

A

Step-by-step explanation:

The farther you move through x, the more y decreases

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The life of a semiconductor laser at a constant power is normally distributed with a mean of 7,000 hours and a standard deviatio
Scrat [10]

This question not incomplete

Complete Question

The life of a semiconductor laser at a constant power is normally distributed with a mean of 7,000 hours and a standard deviation of 600 hours. If three lasers are used in a product and they are assumed to fail independently, the probability that all three are still operating after 7,000 hours is closest to? Assuming percentile = 95%

Answer:

0.125

Step-by-step explanation:

Assuming for 95%

z score for 95th percentile = 1.645

We find the Probability using z table.

P(z = 1.645) = P( x ≤ 7000)

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After 7000 hours = P > 7000

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= 1 - 0.95

= 0.05

If three lasers are used in a product and they are assumed to fail independently, the probability that all three are still operating after 7,000 hours is calculated as:

(P > 7000)³

(0.05)³ = 0.125

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3 years ago
What division expression represents the average number of people
Sergeeva-Olga [200]

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One of the factors of the polynomial
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If y=1/4 when x=5, find y when x=7, given that y directly with x
mariarad [96]

Answer:

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Step-by-step explanation:

Since y varies directly with x, the ratio of y to x is proportional.

... y / 7 = (1/4)/(5)

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