3 years ago

Subtract 11b^2 - 46 + 7 from b^2 + 86 - 9.

Mathematics

1 answer:

Alina [70]3 years ago

6 0

Answer:

(b^2 + 8b - 9) - (11b^2 + 4b -7)

b^2 + 8b - 9 - 11b^2 - 4b + 7

- 10b^2 + 12b -16

Step-by-step explanation:

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A manufacturing firm tests job applicants. Test scores are normally distributed with a mean of 500 and a standard deviation of 5

Blababa [14]

Answer:

The probability that the candidate score is 600 or greater

P(X≥ 600 ) = 0.0228

Step-by-step explanation:

Step(i):-

Given mean of the Population = 500

Given standard deviation of the Population = 50

Let 'X' be the random variable in normal distribution

Given X = 600

$Z = \frac{x-mean}{S.D} = \frac{600-500}{50} = \frac{100}{50} =2$

Step(ii):-

The probability that the candidate score is 600 or greater

P(X≥ 600 ) = P(z≥2)

= 0.5 - A(2)

= 0.5 -0.4772

= 0.0228

Final answer:-

The probability that the candidate score is 600 or greater

P(X≥ 600 ) = 0.0228

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2 years ago

Solve using unit rates. A person on a moving sidewalk travels 10 feet in 5 seconds. The moving sidewalk has a length of 80 feet.

melomori [17]

Answer:

it will take 8 seconds

Step-by-step explanation:

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2 years ago

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Which of the following is a reasonable estimated answer to the following problem?

bulgar [2K]

$989,867 \approx 1,000,000$
$999 \approx 1000$

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So the answer is approximately 1000.

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a bill to landscape your yard is $720. the material cost $375 and the labor is $34.50 per hour . Write and solve an equation to

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