Answer:
Yes. There is sufficient eveidence to support the claim that Wilmington resident's earn more than the national average
Step-by-step explanation:
Given the following;
#We set our hypothesis as:
The rejection region of either hypothesis:
, we determine the critical values for this probability in the T distribution table;
=>We reject for all values greater than 1.833, t>1.833.
#We now determine the value of the test statistic as:
We find that:
Hence, there is sufficient eveidence to support the claim that Wilmington resident's earn more than the national average.
The answer should be b according to me
<h3><u>
Answer:</u></h3>
<h3><u>
Step-by-step explanation:</u></h3>
- x2 + 2x + 1 + y2 + 2x + 3
- => 2x + 2x + 1 + 2y + 2x + 3
- => 4x + 1 + 2y + 2x + 3
- => 6x + 1 + 2y + 3
- => <u>6x + 4 + 2y</u>
<h3><u>
Conclusion:</u></h3>
Therefore, the above answer is correct.
Hoped this helped.
Answer:
The value of cos 0 = - 2 sqrt(85) / 85 = - 0.216930458
Step-by-step explanation:
cos 0 = ?
Point on the terminal side of 0 : (-2,9)=(x,y)→x=-2, y=9
cos 0 = x/r
r=sqrt(x^2+y^2)
Replacing the known values:
r=sqrt( (-2)^2+(9)^2)
r=sqrt(4+81)
r=sqrt(85)
cos 0 = x/r
cos 0 = -2 / sqrt(85) = -2/9.219544457 = -0.216930458
Rationalizing:
cos 0 = -[2 / sqrt(85)] [sqrt(85) / sqrt(85)]
cos 0 = - 2 sqrt(85) / [sqrt(85)]^2
cos 0 = - 2 sqrt(85) / 85
