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Scorpion4ik [409]
3 years ago
9

An equation was used to predict possible sales of phones for 6 months. The actual sales of phones are also listed. Actual sales

55 150 325 510 780 990 Predicted sales 40 150 300 500 800 1,000. The sum of the residuals is ______.
Mathematics
2 answers:
Ugo [173]3 years ago
8 0
The residue in each case is the difference between actual and predicted sales. Thus:
55 - 40 = 15
150 - 150 = 0
325 - 300 = 25
510 - 500 = 10
800 - 780 = 20
1000 - 990 = 10
These add up to be:
15 + 25+ 10 +20 +10
= 80
Valentin [98]3 years ago
6 0

Answer:

I'm not sure but I think the answer is 20

Step-by-step explanation:

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Use synthetic division to find the result when 3x^3 + 13x^2 + x – 12 is divided by<br> X + 4.
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Answer:

3x² + x - 3

Step-by-step explanation:

The way I like to do it is to get rid of the x's and just use the numbers in the case of synthetic division

Pretend the square root of the division symbol

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Quick note: We're dividing by -4 because we're dividing by x + 4

First bring down the 3

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      3

Multiply it by 4 then bring add it to the next number

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Add that number to the next one

-4 √ 3 13 1 -12

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Finally repeat the step for the last number

-4 √ 3 13 1 -12

       3 -12 -4 +12

       3    1   -3   0

Now take those bottom numbers and add back the x's but with one less power, so the starting x³ would now become x², x² would become x, and so on

3x² + 1x - 3

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2 years ago
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Answer:B

Step-by-step explanation:

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X= 11
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