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natka813 [3]
3 years ago
15

Please help urgently help❤️❤️❤️

Mathematics
1 answer:
miss Akunina [59]3 years ago
8 0

Answer:

Question 3 - B

Question 5 - A

Step-by-step explanation:

Question 3

-2(x+6)(x-1)  - answer B

Expand the brackets

(x+6)(x-1) = x² - x + 6x - 6

Simplify = x² + 5x - 6

Now multiply this by -2

-2(x² + 5x - 6) = -2x² + 10x + 12

Question 5

5(x² + 8)(x² - 8) - answer A

First expand brackets.

(x² + 8)(x² - 8) = x⁴ - 8x² + 8x² - 64

8x² cancels out to x⁴ - 64

Now multiply this by 5

5(x⁴ - 64) = 5x⁴ - 320

Hope this has helped. These are the answers I can help with.

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Find 8x397 show your work and explain why the strategy u chose works best with the factors
timama [110]
To find 8x397, I used the stack method.

a.)   397
  <u>   x     8   </u>
      3176

b.)   This method works best because it's easy to do, and the factors aren't too big to multiply by hand, unless it was like a billion times a million. But in this case, it's not, so it's perfectly fine to use the stack method.

I hope this helps and have a good night! :D
4 0
4 years ago
Evaluate 4c + 8 when c = 2
Wittaler [7]

Answer:

16

Step-by-step explanation:

4c + 8

Replace 'c' with 2 and evaluate:

4(2) + 8

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Hope this helps.

8 0
3 years ago
Read 2 more answers
Q.8 What is the tail length?
Arlecino [84]
If I'm correct you should make a fraction first
5.4            3.6
-----    to    -----
4.8              ?

Now find the missing number
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           ÷<span>1.5   </span>
5.4               3.6
-----       to    -----
4.8                3.2
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The tail length should be 3.2 feet
3 0
4 years ago
19.2 is what percent of 24
Aleonysh [2.5K]
19.2 is 80% of 24. :)  :) :) 
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4 years ago
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IgorLugansk [536]

Answer:

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5 0
4 years ago
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