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Hitman42 [59]
3 years ago
6

I only need help with II please

Mathematics
1 answer:
Marina86 [1]3 years ago
5 0
A.) 2w-3=h b.) A=(2w-3)^2
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to increase the mean of 4 numbers by 2, by how much would the sum of the 4 numbers have to increase? check image.
solong [7]

Answer:

8

Step-by-step explanation:  

x=average

(x+x+x+x)/4=average

to increase x by 2 you add 2

x+2=average

(x+2+x+2+x+2+x+2)=4=(4x+8)/4=x+2

you'd have to increase the sum by 8 to make the numbers' averages' go up by 2

8 0
2 years ago
A professor's son, having made the wise decision to drop out of college, has been finding his way in life taking one job or anot
Trava [24]

Answer:

88.88% probability that it endures for less than a year and a half

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 question, we have that:

\mu = 66, \sigma = 10

The next career begins on Monday; what is the likelihood that it endures for less than a year and a half?

One year has 52.14 weeks. So a year and a half has 1.5*52.14 = 78.21 weeks.

So this probability is the pvalue of Z when X = 78.21.

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

Z = \frac{78.21 - 66}{10}

Z = 1.22

Z = 1.22 has a pvalue of 0.8888

88.88% probability that it endures for less than a year and a half

6 0
3 years ago
Which statement is true about this data set? {43, 46, 48, 57, 42, 47, 48, 44, 46, 45, 48}
vfiekz [6]

Answer: D) 57

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Mr. Harris is adding tiles to his patio area. On Monday, he tiled
goblinko [34]

Answer:

The Answer is D

Step-by-step explanation:

there u go

8 0
2 years ago
The associative property of addition says you can change the( order,grouping,operation) of addends without affecting the sum.Whi
PIT_PIT [208]

grouping: (a+b)+c = a+ (b+c)

7 0
3 years ago
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