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3 years ago

Answer three questions for 11 points

Mathematics

2 answers:

Ksenya-84 [330]3 years ago

8 0

3. A 2.b 1.a i think if this is correct then I hope this helps

Gnesinka [82]3 years ago

8 0

1. Since dazzling is 9 times brighter than radiant, and radiant is 9 times brighter than illuminated, them dazzling is (9*9=81) 81 times brighter than illuminated
Answer=81 times

2.
To solve this we first have to put the mixed numbers in decimal form.
2 5/8=2.625
2 2/3=2.66666666

So now that they are all in decimal form, its easier to see that A is the answer that correctly places them in order for least to greatest.
Answer=A

3.For the coldest temperature, we need to find the lowest number. -20 is the lowest number given, therefore it is the coldest temperature.
Answer=C

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Which of the following is a solution of 4x2 = − 9x − 4?

Arte-miy333 [17]

Step-by-step explanation:

4x2=−9x−4

Step 1: Subtract -9x-4 from both sides.

4x2−(−9x−4)=−9x−4−(−9x−4)

4x2+9x+4=0

For this equation: a=4, b=9, c=4

4x2+9x+4=0

Step 2: Use quadratic formula with a=4, b=9, c=4.

−b±√b2−4ac

−(9)±√(9)2−4(4)(4)

2(4)

−9±√17

−9

√17 or x=

−9

−1

√17

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4 years ago

A study of the impact of executive networking on firm performance measured firm performance as annual return on equity (ROE), r

vova2212 [387]

Answer:

The value of ROE that will be exceeded by 78% of the firms is -1.77%.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma,$ the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

The mean ROE for the firms studied was 14.93% and the standard deviation was 21.74%. This means that $\mu = 0.1493, \sigma = 0.2174$