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tekilochka [14]
3 years ago
11

Plsssssss help i need it.

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
7 0
I would say decreasing!
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24
Zarrin [17]
M= -2/5
D is the answer
6 0
2 years ago
Read 2 more answers
Shaun's savings can be modeled by the regression equation y = 6x^2 + 75x+200. Which of the following is the best prediction for
Zolol [24]

Answer:

D

Step-by-step explanation:

The equation given gives y in terms of x, where y is Shaun's savings and x is the number of months.

<em>We want to know the amount he will save in 25 months, so we can plug in x = 25 into the equation and get a value of y, that is the amount he will save. So:</em>

y = 6x^2 + 75x+200\\y = 6(25)^2 + 75(25)+200\\y=5825

D is the correct answer.

7 0
3 years ago
The distribution of results from a cholesterol test has a mean of 180 and a standard deviation of 20. A sample size of 40 is dra
olga2289 [7]

Using the normal distribution, there is a 0.2148 = 21.48% probability that the sum of the 40 values is less than 7,100.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

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

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
  • By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation s = \frac{\sigma}{\sqrt{n}}.

For this problem, these parameters are given as follows:

\mu = 180, \sigma = 20, n = 40, s = \frac{20}{\sqrt{40}} = 3.1623

A sum of 7100 is equivalent to a sample mean of 7100/40 = 177.5, which means that the probability is the <u>p-value of Z when X = 177.5</u>, hence:

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

By the Central Limit Theorem:

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

Z = \frac{177.5 - 180}{3.1623}

Z = -0.79

Z = -0.79 has a p-value of 0.2148.

There is a 0.2148 = 21.48% probability that the sum of the 40 values is less than 7,100.

More can be learned about the normal distribution at brainly.com/question/28135235

#SPJ1

5 0
2 years ago
Only individuals over the age of 60 need to create an estate plan? True or False
MaRussiya [10]
The answer for this question would be B) False because everybody should create an estate plan.
6 0
3 years ago
Read 2 more answers
What is the solution to the system of equations?<br> y = 2/3x + 3<br> x=-2.
Dafna11 [192]
The answer is y=1.667
4 0
3 years ago
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