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Alla [95]
2 years ago
11

If using the method of completing the square to solve the quadratic equation x^2 + 9 x + 7 = 0 , which number would have to be a

dded to "complete the square"?
Mathematics
1 answer:
FinnZ [79.3K]2 years ago
6 0

Answer:

(x+9)^2=53/4

Step-by-step explanation:

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There are 442 boy students in class
poizon [28]

Answer:

520

Step-by-step explanation:

This problem is

boys + girls = total

Boys = 442

Girls = 15% of the total

Therefore, substituting in, gives us:

442 + .15t = t, where t is total

Then 442 = .85t and

t = 520

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3 years ago
Rounding decimals 32.60
UNO [17]
Well, assuming that you need to round to the nearest whole number, what is six closer to? 0, or 10? The answer is 10. Therefore, you would round up to 33. Hope this helps!
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3 years ago
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The average of 9 scores is x. If the tenth score is 36 points more than x, by how many points will the tenth score raise the ave
Alecsey [184]

Answer:

3.6

Step-by-step explanation:

The average of 9 scores is x.

average = (sum of scores)/(number of scores)

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sum of scores = 9x

The sum of the 9 scores is 9x.

The tenth score is 36 more than x, so it is x + 36.

The sum of the 10 scores is 9x + x + 36 = 10x + 36.

The average of the 10 scores is (10x + 36)/10 = x + 3.6

The difference of averages is

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frosja888 [35]
8====D

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