Answer:
I would try to help you but i dropped out in the 2nd grade back in 86 so you messed up sir
Step-by-step explanation:
Answer:
2n - 5 = 7
Step-by-step explanation:
Let the number = n
Twice a number = 2n
5 less than twice a number = 2n - 5
2n - 5 = 7
Answer:
![2x-y=-3](https://tex.z-dn.net/?f=2x-y%3D-3)
Step-by-step explanation:
step 1
Find the slope of the given line
we have
![2x-y=6](https://tex.z-dn.net/?f=2x-y%3D6)
isolate the variable y
----> equation of the line in slope intercept form
The slope of the given line is ![m=2](https://tex.z-dn.net/?f=m%3D2)
step 2
Find the slope of the parallel line to the given line
Remember that if two lines are parallel, then their slopes are the same
therefore
The slope of the parallel line to the given line is ![m=2](https://tex.z-dn.net/?f=m%3D2)
step 3
Find the equation of the line in point slope form
![y-y1=m(x-x1)](https://tex.z-dn.net/?f=y-y1%3Dm%28x-x1%29)
we have
![m=2](https://tex.z-dn.net/?f=m%3D2)
![point\ (-6,-9)](https://tex.z-dn.net/?f=point%5C%20%28-6%2C-9%29)
![y+9=2(x+6)](https://tex.z-dn.net/?f=y%2B9%3D2%28x%2B6%29)
step 4
Convert to slope intercept form
isolate the variable y
![y+9=2(x+6)\\y+9=2x+12\\y=2x+12-9\\y=2x+3](https://tex.z-dn.net/?f=y%2B9%3D2%28x%2B6%29%5C%5Cy%2B9%3D2x%2B12%5C%5Cy%3D2x%2B12-9%5C%5Cy%3D2x%2B3)
step 5
Convert to standard form
![AX+BY=C](https://tex.z-dn.net/?f=AX%2BBY%3DC)
where
A is a positive integer
B and C are integer
![y=2x+3\\2x-y=-3](https://tex.z-dn.net/?f=y%3D2x%2B3%5C%5C2x-y%3D-3)
Answer:
22 miles per hour
Step-by-step explanation:
we know that
The speed is the ratio of distance by the time
Let
d -----> distance in feet
t ----> time in seconds
s ----> the speed in ft/sec
![s=\frac{d}{t}](https://tex.z-dn.net/?f=s%3D%5Cfrac%7Bd%7D%7Bt%7D)
we have
![d=100\ ft\\t=3.1\ sec](https://tex.z-dn.net/?f=d%3D100%5C%20ft%5C%5Ct%3D3.1%5C%20sec)
substitute
![s=\frac{100}{3.1}](https://tex.z-dn.net/?f=s%3D%5Cfrac%7B100%7D%7B3.1%7D)
![s=32.26\frac{ft}{sec}](https://tex.z-dn.net/?f=s%3D32.26%5Cfrac%7Bft%7D%7Bsec%7D)
Remember that
![1\ mi=5,280\ ft](https://tex.z-dn.net/?f=1%5C%20mi%3D5%2C280%5C%20ft)
![1\ h=3,600\ sec](https://tex.z-dn.net/?f=1%5C%20h%3D3%2C600%5C%20sec)
Convert ft/sec to mi/h
![s=32.26\frac{ft}{sec}=32.26\frac{(1/5,280)}{(1/3,600)}=32.26(\frac{3,600}{5,280})=22\ \frac{mi}{h}](https://tex.z-dn.net/?f=s%3D32.26%5Cfrac%7Bft%7D%7Bsec%7D%3D32.26%5Cfrac%7B%281%2F5%2C280%29%7D%7B%281%2F3%2C600%29%7D%3D32.26%28%5Cfrac%7B3%2C600%7D%7B5%2C280%7D%29%3D22%5C%20%5Cfrac%7Bmi%7D%7Bh%7D)
It is the stratified random sampling technique that was used by the school administrator.
Sampling methods are defined as how we choose members for study purposes from the population.When a person is not randomly selected which maybe it be biased somehow, the data may not be representative of the population. Stratified random sample, In this sampling, the population chosen is split first into groups ., the overall sample consists of some members from every group, and those members are chosen randomly from every group, this sampling guarantees that members from each group will be represented in the sample.
To know more about sampling methods refer to the link brainly.com/question/12902833?referrer=searchResults.
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