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Svetlanka [38]
3 years ago
7

What is the product? (3.4)(-7.8 a.-26.52 b.11.2 c.-11.2 d.-21

Mathematics
1 answer:
maria [59]3 years ago
4 0

Answer:

-26.52

Step-by-step explanation:

I believe you meant (3.4)(-7.8).

As one of these factors is + and the other is -, the product will be -.

Then the product is -(3.4)(7.8), or approx -3(8), or -24.

Rewriting -(3.4)(7.8) in terms of the equivalent improper fractions, we get

-34     78       12652

----- * ----- = -------------     This may also be written as -26.52.

 10     10         100

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If each customer takes 3 minutes to check out, what is the probability that it will take more than 9 minutes for all the custome
AnnyKZ [126]

Using a discrete probability distribution, it is found that there is a 0.15 = 15% probability that it will take more than 9 minutes for all the customers currently in line to check out.

<h3>What is the discrete probability distribution?</h3>

Researching the problem on the internet, it is found that the distribution for the number of customers in line at the store is given by:

  • P(X = 0) = 0.2;
  • P(X = 1) = 0.15;
  • P(X = 2) = 0.30;
  • P(X = 3) = 0.20;
  • P(X = 4) = 0.10;
  • P(X = 5) = 0.05;

Hence, since each customer takes 3 minutes to check out, the probability that it will take more than 9 minutes for all the customers currently in line to check out is the probability that there are more than 3 customers, hence:

P(X > 3) = P(X = 4) + P(X = 5) = 0.10 + 0.05 = 0.15.

0.15 = 15% probability that it will take more than 9 minutes for all the customers currently in line to check out.

More can be learned about a discrete probability distribution at brainly.com/question/24855677

7 0
2 years ago
What is the completely factored form of x4 8x2 – 9?
Alinara [238K]

For this case we have the following polynomial:

x ^ 4 + 8x ^ 2 - 9

We make the following change of variables:

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Rewriting we have

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Factoring the second order polynomial we have:

(u + 9) (u-1)

Then, returning the change we have:

(x ^ 2 + 9) (x ^ 2-1)

Finally, we factor the expression in the parentheses of the second term:

(x ^ 2 + 9) (x + 1) (x-1)

Answer:

the completely factored form is:

(x ^ 2 + 9) (x + 1) (x-1)

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The true statement relating to a property of the function y =sin x is that the maximum and minimum values of the function are 1 and -1 respectively. Option B

<h3>Properties of the function</h3>

The following are the properties of the sin trigonometric ratio of the function;

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  • The domain of y = sin x is the set of all real numbers
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From the above listed deductions, we can see that the true statement about the function y = sin x is that the range which is always known as the maximum and minimum values of the function are 1 and - 1 respectively.

Thus, the true statement relating to a property of the function y =sin x is that the maximum and minimum values of the function are 1 and -1 respectively. Option B

Learn more about the sine function here:

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6 0
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The pizza shop sells artwork by local artists. For each piece it sells, the shop receives a 15 percent commission. The most expe
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Answer:

The 15 percent commission is what the shop received.

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