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3 years ago

What's the Error? Explain the error. Find the correct solution.19 + (-31) = 12

Mathematics

1 answer:

Alex3 years ago

5 0

Answer:

The answer is incorrect because 12 should be negative not positive.

Step-by-step explanation:

1. 19 + -31 = - 12

2. Twelve is negative because if you were to start off at -31 and add 19 the answer would remain negative since -31 in a sense is "bigger" than 19. You would need more of a positive number to make -31 positive such as 40.

40+ -31 = 9

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3 years ago

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3 years ago

A company has 2 machines that manufacture widgets. An older machine manufactures 25% defective widgets, while the new machine ma

Bingel [31]

Answer:

73.90%

Step-by-step explanation:

Let Event D=Defective, D' = Non Defective

Let Event N=New Machine, N' = Old Machine

From the given information:

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We are required to calculate the probability that a widget was manufactured by the new machine given that it is non defective.

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Using Baye's Law of conditional Probability

$P(N|D')=\dfrac{P(D'|N)P(N)}{P(D'|N)P(N)+P(D'|N')P(N')} \\=\dfrac{0.91*0.7}{0.91*0.7+0.75*0.3}\\ =0.73897\\\approx 0.7390$

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3 years ago

Arrange the given polynomial in descending order. 3x+7x +1

Mashutka [201]

Answer:

10x + 1

Step-by-step explanation:

First, combine any like terms. Then make sure to rewrite in descending order.

3x + 7x + 1 <== combine any like terms

10x + 1 <== arrange in descending order

Hope this helps!

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3 years ago

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In a research study, there are typically two main variables that direct the scientific enquiry. They are:

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3 years ago

What's the Error? Explain the error. Find the correct solution.19 + (-31) = 12​

What's the Error? Explain the error. Find the correct solution.19 + (-31) = 12