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Y_Kistochka [10]
3 years ago
8

Write a linear function f with the values f (-1) = 5 and f (3) = 4. A function is f(x) =

Mathematics
1 answer:
Drupady [299]3 years ago
5 0

Answer:

Step-by-step explanation:

Since we have points (-1,5) and (3,4) we can find the slope m of y=mx+b

m=(y2-y1)/(x2-d1)=(5-4)/(-1-3)=1/-4=-1/4 so we have

y=-x/4+b, using point (3,4) we can solve for the y intercept, b.

4=-3/4+b, b=19/4, so the line is

y=(-x+19)/4

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In a random sample of 30 people who rode a roller coaster one day, the mean wait time is 46.7 minutes with a standard deviation
Rainbow [258]

Answer: C. (29,\ 37.8)

Step-by-step explanation:

The confidence interval for difference of two population mean is given by :-

\overline{x}_1-\overline{x}_2\pm z_{\alpha/2}\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2}}

Given : Level of significance : 1-\alpha:0.99

Then , significance level : \alpha: 1-0.99=0.01

Critical value : z_{\alpha/2}=z_{0.005}=2.576

n_1=30\ ;\ n_2=50\\\\\overline{x}_1=46.7\ ;\ \overline{x}_2=13.3\\\\s_1=9.2\ ;\ s_2=1.9

46.7-13.3\pm(2.576)\sqrt{\dfrac{9.2^2}{30}+\dfrac{1.9^2}{50}}\approx33.4\pm4.38=(29.02\ ,37.78)\approx(29,\ 37.8)

Hence,  a 99% confidence interval for the difference between the mean wait times of everyone who rode both rides (29,\ 37.8)

5 0
4 years ago
Solve the system of equations using subtraction. <br> 2x - 4y = - 12 <br>2x + y = 13​
alisha [4.7K]
First can you change
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7 0
3 years ago
What is 30.12 rounded to one decimal place
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 it should be rounded to 30.1
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how long will it take for an investment of 2000 to double given an annual interest rate of 6% compounded monthly
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Hope this helps.
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What is the distance between 15 miles east and 12 miles west?
inysia [295]

Answer:

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Step-by-step explanation:

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