2 years ago

Duane recorded the temperature outside his window one morning. On the second day,

Mathematics

1 answer:

larisa86 [58]2 years ago

7 0

Answer:

Step-by-step explanation:

$day 2 = +7\\\\day3 = -10\\\\day 4 = -6\\\\FinalDay = 1$

so $start +7 -10-6 = 1\\ \\start = 10$

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Sara wrote 524 words in her journal. Then she crossed out 56 words and added 95 new words. How many words are written in her jou

Musya8 [376]

You have 524 words then subtract by 56 bc she crossed them out and then she added 95 by writing them so therefor the answer is 563

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3 years ago

A factory received a shipment of 11 hammers, and the vendor who sold the items knows there are 2 hammers in the shipment that ar

zhenek [66]

Question:

If a sample of 2 hammer is selected

(a) find the probability that all in the sample are defective.

(b) find the probability that none in the sample are defective.

Answer:

a $Pr = \frac{2}{110}$

b $Pr = \frac{72}{110}$

Step-by-step explanation:

Given

$n = 11$ --- hammers

$r = 2$ --- selection

This will be treated as selection without replacement. So, 1 will be subtracted from subsequent probabilities

Solving (a): Probability that both selection are defective.

For two selections, the probability that all are defective is:

$Pr = P(D) * P(D)$

$Pr = \frac{2}{11} * \frac{2-1}{11-1}$

$Pr = \frac{2}{11} * \frac{1}{10}$

$Pr = \frac{2}{110}$

Solving (b): Probability that none are defective.

The probability that a selection is not defective is:

$P(D') = \frac{9}{11}$

For two selections, the probability that all are not defective is:

$Pr = P(D') * P(D')$

$Pr = \frac{9}{11} * \frac{9-1}{11-1}$

$Pr = \frac{9}{11} * \frac{8}{10}$

$Pr = \frac{72}{110}$

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2 years ago

What expression is not equivalent to this expression: 75a + 50b

nadya68 [22]

25(3a+2b)
Factor out 25 from the expression

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2 years ago

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Sever21 [200]

Answer:79

Step-by-step explanation:78: I love the noise

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2 years ago

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aleksklad [387]

So what you do,is you add them together to get 13/10 but then you can also simplify it but you can keep the answer to 13/10

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2 years ago

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