3 years ago

Simplify (3x)–1 A. 81x^4 B. 1/3x C. 1/x^6 D. 4x^6

Mathematics

1 answer:

svetoff [14.1K]3 years ago

8 0

A 243x^5-1
B x^2-1
C −x5+3x5
D 12x^7-1

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OLga [1]

A^2 + b^2 = c^2
b^2 = c^2 - a^2
b^2 = 137^2 - 105^2
b^2 = 18769 - 11025
b^2 = 7744
b = sqrt 7744
b = 88

Gina's step is not correct... the length of the unknown leg is not 7744, it is the sqrt of 7744, which is 88

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Small sample: During an economic downturn, companies were sampled and asked whether they were planning to increase their workfor

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Complete Question

The complete question is shown on the first uploaded image

Answer:

The confidence level interval is $0.016 \le C \le 0.404$

Step-by-step explanation:

The sample size is $n = 20$

The number planning to increase workforce is $x = 3$

The confidence level is $c = 98$ %

The value of proportion for a plus 4 method is

$p = \frac{x+2}{n+4}$

substituting values

$p = \frac{3+2}{20+4}$

$p =0.21$

The z-critical value at confidence level of 98% is

$z_{c}=z_{0.98} = 2.33$

This values is obtained from the standard normal table

The confidence level interval can be mathematically represented as

$C =p \ \pm z_{c} * \sqrt{\frac{p(1-p)}{n+4} }$

substituting values

$C = 0.21 \pm 2.33 * \sqrt{\frac{0.21(1- 0.21)}{20 +4} }$

$C = 0.21 \pm 0.194$

=> $0.016 \le C \le 0.404$

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3 years ago

(-19, 12) , (-9, 1) slope again

siniylev [52]

Answer: 11/-10

Why?
Difference of y / difference of x
12-1 / -19+9= 11/-10

So the slope is 11/-10

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Anna [14]

The answer would be m=12

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algol13

I dont know i will tell you when i find out

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