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slava [35]
4 years ago
9

What is 2(log38+logzz)-log3(34 – 72) written as a single logarithm?

Mathematics
1 answer:
Alona [7]4 years ago
6 0

Answer: log3 2z

Step-by-step explanation:

Just did it on Edge

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16% of students scored higher than 80 on a recent normally distributed exam the standard deviation is 10 what is the mean
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Answer:

70.06

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Step-by-step explanation:

16% of students scored higher than 80 on a recent normally distributed exam the standard deviation is 10 what is the mean

For a normal distribution :

Zscore = (x - mean) / standard deviation

x = score

P(Z > 80) = 16% = 0.16 ; corresponding Zscore = 0.994 (Z probability calculator)

Therefore ;

0.994 = (80 - mean) / 10

0.994 * 10 = 80 - mean

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Mean = 80 - 9.94

Mean = 70.06

Hence, the mean score = 70.06 = 70

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3 years ago
What is the product of (a + 3)(a - 2)
telo118 [61]

Answer: a^2+a-6

Step-by-step explanation:

To solve the exercise you must apply the following proccedure:

- Apply the distributive property.

- Keepn on mind that when you multiply two powers with equal base, you must add the exponents.

- Add like terms.

Then:

(a)(a)-(a)(2)+(3)(a)-(3)(2)=a^2-2a+3a-6=a^2+a-6

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