Since each pack has 8 hot dogs and have 56 in total you use the equation p(8)=56 and just divide by 8 getting 7. They bought 7 packs of hot dogs.
16 + (-3) = (n+3) + (-3)
N = 13
Answer:
We are given that The valve was tested on 150 engines and the mean pressure was 7.7 lbs/square inch.
We are also given that the valve was designed to produce a mean pressure of 7.6 lbs/square inch
So,
Null hypothesis:
Alternate hypothesis :
Since n > 30 and population standard deviation is given
So, We will use z test
Formula :
Substitute the values
refer the z table for p value
so, p value is 0.9927
Since it is a two tailed test So, p = 2(1- 0.9927) = 0.0146
α = 0.1
p value< α
So, we reject null hypothesis
Hence There is sufficient evidence at the 0.1 level that the valve does not perform to the specifications
Answer:
x = -3
Step-by-step explanation:
<em>I hope you mean "no solution" as in 'equal to zero' because that's what I'm doing and what makes sense.</em>
<em>Start by setting the equation equal to zero.</em>
3x + 9 = 0
<em>Subtract the </em><em>9</em><em> from both sides to move it to the right side.</em>
3x = -9
<em>Divide the </em><em>3</em><em> from both sides to isolate the </em><em>x.</em>
x = -3
<em>We can check that </em><em>x = -3</em><em> is the correct answer by plugging it in and seeing if it equals </em><em>zero</em><em>.</em>
3(-3) + 9
-9 + 9
0