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2 years ago

-5a - 12a + 2b - 3b

Mathematics

1 answer:

steposvetlana [31]2 years ago

6 0

Answer: −

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Step-by-step explanation:

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Ten times the sum of a number and 8 is 73

weqwewe [10]

10(n+8) = 73

if you need to find the number then
10n + 80 = 73
10n = -7
n = -7/10
n = -0.7

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3 years ago

What property is 3(14)=(14)3

ExtremeBDS [4]

Commutative property. Just means you can change the order when multiplying and the answer is the same.

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2 years ago

Is this prime or can it be factored?

poizon [28]

Factor the following:
6 x^2 - 19 x + 10
Factor the quadratic 6 x^2 - 19 x + 10. The coefficient of x^2 is 6 and the constant term is 10.
The product of 6 and 10 is 60. The factors of 60 which sum to -19 are -4 and -15.
So 6 x^2 - 19 x + 10 = 6 x^2 - 15 x - 4 x + 10 = 2 x (3 x - 2) - 5 (3 x - 2):
2 x (3 x - 2) - 5 (3 x - 2)
Factor 3 x - 2 from 2 x (3 x - 2) - 5 (3 x - 2):
Answer: (3 x - 2) (2 x - 5)

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3 years ago

The average telephone bill in a locality is $70, with a standard deviation of $40. In a sample of 50 randomly selected phone con

Sever21 [200]

Using the normal distribution, there is a 0.1894 = 18.94% probability that the sample average will exceed $75.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean $\mu$ and standard deviation $\sigma$ is given by:

$Z = \frac{X - \mu}{\sigma}$

The z-score measures how many standard deviations the measure is above or below the mean.

Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

The parameters for this problem are given as follows:

$\mu = 70, \sigma = 40, n = 50, s = \frac{40}{\sqrt{50}} = 5.66$

The probability that the sample average will exceed $75 is <u>one subtracted by the p-value of Z when X = 75,</u> hence:

$Z = \frac{X - \mu}{\sigma}$

By the Central Limit Theorem

$Z = \frac{X - \mu}{s}$

Z = (75 - 70)/5.66

Z = 0.88

Z = 0.88 has a p-value of 0.8106.

1 - 0.8106 = 0.1894.

0.1894 = 18.94% probability that the sample average will exceed $75.

More can be learned about the normal distribution at brainly.com/question/28096232

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1 year ago

Alex needs a car for a year. which option below would be the cheapest for that length of time? assume that a month has 30 days b

frutty [35]

Financing a car. just did it on apex

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3 years ago

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