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sergey [27]
2 years ago
5

Please help, lots of points and will mark brainliest! :)

Mathematics
1 answer:
Anna71 [15]2 years ago
8 0

Answer:

1) -4

2) 2/3

Step-by-step explanation:

1) f(x)=x+4

*subtract 4 to both sides

x=-4

2) f(x)=3x-2

*add 2 to both sides then divide by 3*

x= 2/3

hope this helps :)

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g100num [7]

Answer:

98

Step-by-step explanation:

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How do you find the mean of a stem and leaf plot
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3 years ago
Can someone please help me like I really need help this problem has to have more than one step to be solved I really need help a
kumpel [21]

Answer:

85°

Step-by-step explanation:

Please follow along with these directions on the attached picture so that this makes sense.  I have labeled the picture with the variables I used and the angles I figured out.

Let's start in the top left corner. Remember: triangles always have 180°, and straight lines always have 180°.

180-115 = 65

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8 0
2 years ago
A major department store chain is interested in estimating the mean amount its credit card customers spent on their first visit
sergiy2304 [10]

Answer:

95% Confidence interval: (39.43, 61.58)

Step-by-step explanation:

We are given the following in the question:

Sample mean, \bar{x} = $50.50

Sample size, n = 15

Alpha, α = 0.05

Sample standard deviation = 20

95% Confidence interval:

\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

t_{critical}\text{ at degree of freedom 14 and}~\alpha_{0.05} = \pm 2.1447  

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95% Confidence interval: (39.43, 61.58)

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3 years ago
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iogann1982 [59]

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1/2 hr 27.5

1 1/2 hr 82.5

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Step-by-step explanation:

7 0
2 years ago
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