Answer:
a.) y= 25 + 5x
b.) 45$
Step-by-step explanation:
25$ from the start and adds 5 for extra
y= 25+5(4)
y=25+20
y=45$
opposites are also called additive inverse and have the sum of zero.
Answer:
$255
Step-by-step explanation:
As, the area of the pool bottom = length x breath
= 20 x 15 = 300 square foot
So for painting
Per square foot = $0.85
So for 300 square foot = $0.85 x 300
= $255
Answer:
The p -value is less than 0.001.
Step-by-step explanation:
Given information:
Sample size = 25 chips
Sample mean = 985
Sample standard deviation = 10
Let as assume that sample is distributed normally.
The formula for test statistic
![t=\frac{\overline{x}-\mu}{\frac{s}{\sqrt{n}}}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B%5Coverline%7Bx%7D-%5Cmu%7D%7B%5Cfrac%7Bs%7D%7B%5Csqrt%7Bn%7D%7D%7D)
where,
is sample mean
μ is population mean.
s is sample standard deviation.
n is sample size.
The value of test statistic is
![t=\frac{985-1000}{\frac{10}{\sqrt{25}}}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B985-1000%7D%7B%5Cfrac%7B10%7D%7B%5Csqrt%7B25%7D%7D%7D)
![t=\frac{985-1000}{\frac{10}{\sqrt{25}}}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B985-1000%7D%7B%5Cfrac%7B10%7D%7B%5Csqrt%7B25%7D%7D%7D)
![t=-7.5](https://tex.z-dn.net/?f=t%3D-7.5)
The p-value is
![p=2\times p(t](https://tex.z-dn.net/?f=p%3D2%5Ctimes%20p%28t%3C-7.5%29%3D2%5Ctimes%200.000%3D0)
Therefore the p -value is less than 0.001.