Answer: 19?
Step-by-step explanation:
Answer:
Step-by-step explanation:
8(5x - 3)...distribute the 8 thru the parenthesis
8(5x) - 8(3) =
40x - 24
Answer:
a) x = 80.40
s = 29.54
b) lower limit = 69.53
upper limit = 91.27
Step-by-step explanation:
The mean price is:
The standard deviation is
![s=\sqrt{\frac{1}{n-1}\sum(x_i-\bar X)^2}=\sqrt{\frac{1}{19}[(50-80.4)^2+...+(70-80.4)^2]} \\\\s=\sqrt{\frac{15,471}{19} }=\sqrt{814.25} =29.54](https://tex.z-dn.net/?f=s%3D%5Csqrt%7B%5Cfrac%7B1%7D%7Bn-1%7D%5Csum%28x_i-%5Cbar%20X%29%5E2%7D%3D%5Csqrt%7B%5Cfrac%7B1%7D%7B19%7D%5B%2850-80.4%29%5E2%2B...%2B%2870-80.4%29%5E2%5D%7D%20%5C%5C%5C%5Cs%3D%5Csqrt%7B%5Cfrac%7B15%2C471%7D%7B19%7D%20%7D%3D%5Csqrt%7B814.25%7D%20%3D29.54)
We have to calculate a 90% CI for the mean.
The z-value for a 90% confidence interval is z=1.645.
The margin of error is:
The 90% CI is
The vertex of <span>y=(x-4)(x+18) = (-7,-121)</span>
Step-by-step explanation:
Hours worked = X
Money earned per hour = $8.75
Your answer would be A.
E.g.) Say that there is another part to this question.
You work for 3 hours, how much money would you earn after three hours? Use your equation "8.75x"
We know that "x" is equal to the hours worked, so plug in 3 for x.
8.75x = 8.75 *x
8.75 * 3= 26.25
So, if you worked 3 hours, your total pay would be $26.25 (Note: this is not part of your answer, just an example to show you how equations work)
Hope this helps :)
