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GaryK [48]
2 years ago
8

I got the first part correct but the rest just confuses me

Mathematics
1 answer:
kvv77 [185]2 years ago
4 0
Answer: -2

Step-by-step:
Plug in 8 for X and -4 for Y
-4=-1/4(8)
Multiply 8 into -1/4
-4=-8/4
Then factor
-4=-2
Add 2 to both side
-2=b
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Identify this conic section.<br><br> 9x 2 + 4y 2 = 36
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The mean annual premium for automobile insurance in the United States is $1503 (Insure website, March 6, 2014). Being from Penns
Arturiano [62]

Answer:

It is not evident the mean annual premium in Pennsylvania is lower than the national mean annual premium

Step-by-step explanation:

Given that annual premium for automobile insurance in the United States  (Insure website, March 6, 2014), are as follows:

Mean 1440.00

SD 165.00

SEM 33.00

N 25    

a) H_0: \bar x = 1503\\H_a: \bar x

(left tailed test at 5% level)

b) a point estimate of the difference between the mean annual premium in Pennsylvania and the national mean

=1440-1503\\=-103

c)    df = 24

 standard error of difference = 33.000

t = 1.9091

The   95% confidence interval of this difference:

From -131.11 to 5.11

p value = 0.0683

Since p >0.05, we accept H0

It is not evident the mean annual premium in Pennsylvania is lower than the national mean annual premium

4 0
4 years ago
After selling tickets to a dance for 3.25 each,the student council brought in 1020.50 from ticket sales how many tickets did the
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3 0
3 years ago
Read 2 more answers
Let f(x) = x2 – 16 and g(x) = x + 4. Find fg f g and its domain.
Marta_Voda [28]

Answer: fg =x^3+4x^2-16x-64 and


Domain: All real number. All real number or (-\infty,\infty)



Explanation:


fg means product of two given function f(x) and g(x)


where,  

f(x)=x^2-16 and g(x)=x+4


Now, we have to find fg


So, fg=f(x)\times g(x)


Substitute f(x) and f(x)


\Rightarrow (x^2-16)(x+4)


Using distributive property simplify above expression and we get,  

\Rightarrow x^3+4x^2-16x-64


We can see it is cubic polynomial. So, domain of cubic polynomial is all real number.  

Domain: All real number or (-\infty,\infty)



6 0
3 years ago
Read 2 more answers
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