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Zepler [3.9K]
3 years ago
8

What is the answer to -2(-6n-7)+3(8+7n

Mathematics
1 answer:
Butoxors [25]3 years ago
8 0

Answer:

32n+38

Step-by-step explanation:

-2*-6n=12n

-2*-7=14

(12n+14)

3*8=24

3*7n=21n

12n+14+24+21n

32n+38

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I have a Pythagorean Theorem question please help!
Julli [10]

Answer:

9.2

Step-by-step explanation:

the Pythagorean theorem is a^2 + b^2 = c^2 where c in the hypotenuse

a=6 b=7

6^2+7^2=c^2

36+49=c^2

85=c^2

take the square root of 85, which equals 9.219544457..... and round to the nearest tenth: 9.2

5 0
3 years ago
A government agency has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher intercepted
Andru [333]

Answer:

A) μ = 91.2; σ = 9.3

B) No

Step-by-step explanation:

To find the mean, μ, we use the formula

μ = np, where n is the sample size and p is the probability of success (percentage of times the letter is used).

This gives us

μ = 0.057(1600) = 91.2

To find the standard deviation, we use the formula

σ = √(np(1-p)

This gives us

σ = √(1600×0.057×(1-0.057))

= √(1600×0.057×0.943) = √86.0016 = 9.2737 ≈ 9.3≈

Any value that is more than two standard deviations from the mean is considered unusual.  The value 102 is

(102-91.2)/9.3 = 10.8/9.3 = 1.16 standard deviations from the mean.  This is not statistically unusual.

4 0
3 years ago
Andreas invested $1000 in savings account. After 4 years, the account had earned a total of $112 simple interest without any add
belka [17]
R = 112/1000 x 4 = 0.028 x 100 (find percentage) = 2.8%
8 0
3 years ago
Help with the top asap the first won to answer will be the brianlest
Paha777 [63]

Answer:

0, 15, 30

Step-by-step explanation:

0x3/4=0

20x3/4=15

40x3/4=30

7 0
4 years ago
Read 2 more answers
∆ABC, &lt;B=90 •<br>|AC|=50cm |BCI=14cm Find AB.​
Delvig [45]

Answer:

Step-by-step explanation:

AC = 50 cm

BC = 14 cm

Pythagorean theorem,

AB² + BC² = AC²

AB² + 14² = 50²

AB² + 196 = 2500

AB² =  2500 - 196

AB² = 2304

AB = √2304

AB = 48 cm

8 0
3 years ago
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