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andrew11 [14]
3 years ago
14

The average of 5 numbers is 80. If one number is removed, the average become 50. Find the removed number?

Mathematics
1 answer:
satela [25.4K]3 years ago
8 0
X / 5 = 80
x = 80 * 5
x = 400.......so the total of the numbers added was 400

(400 - x) / 4 = 50
400 - x = 50 * 4
400 - x = 200
-x = 200 - 400
-x = -200
x = 200 <== the removed number
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I don’t understand what to write
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Answer:

No, she's incorrect. You cannot split up something in parenthesis when it is being squared. By doing so she doesn't have a middle term. The correct equation is 25x^6 + 30x^3 + 9

Step-by-step explanation:

1. Square the first term.

(5x^3)^2 = 25x^6

2. Square the second term.

3^2 = 9

3. Multply the two terms together and multiply by two.

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15x^3 × 2 = 30x^3

4. Add everything together.

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I hope this helps!

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"5. Multiple-choice questions each have five possible answers (a,b,c,d,e), one of which is correct. Assume that you guess the an
Nina [5.8K]

Answer:

A) P(WWC) = 0.128

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Step-by-step explanation:

A) Using the multiplication rule, we have; P(A and B) = P(A) x P(B)

Probability of a wrong answer = 4/5 = 0.8

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So we have;

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3 years ago
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