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loris [4]
3 years ago
12

5. Solve. 2 Questions only 86 points c) 9.3 = 3n d) 2n - 2.5 = 5.5

Mathematics
1 answer:
lubasha [3.4K]3 years ago
5 0

Answer:

what that person said

Step-by-step explanation:

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f(x)^-1=x-2/10

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Read 2 more answers
A publisher reports that 45% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is
nexus9112 [7]

Answer:

z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933  

p_v =2*P(z  

Step-by-step explanation:

Information given

n=370 represent the sample selected

\hat p=0.4 estimated proportion of  readers owned a laptop

p_o=0.45 is the value that we want to test

z would represent the statistic

p_v represent the p value

Creating the hypothesis

We need to conduct a hypothesis in order to test if the true proportion of readers owned a laptop is different from 0.45, the system of hypothesis are:  

Null hypothesis:p=0.45  

Alternative hypothesis:p \neq 0.45  

The statistic is:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing we got:

z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933  

Calculating the p value  

We have a bilateral test so then the p value would be:

p_v =2*P(z  

8 0
3 years ago
Geometry question shown above.
Colt1911 [192]
I believe the answer is C, 68. 

Angles A and R are supplementary so:
180=x+124
Angle A=56

AFD is an isosceles triangle so angles A and D are both 56. Then you can use these to solve for angle AFD. 
180 = x+56+56
x=68
5 0
4 years ago
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