Answer:
The answer is 3
Step-by-step explanation:
Answer: 1 hour 20 minutes
Step-by-step explanation:
Given : The old machine could shred a truckload of paper in 4 hours.
Rate of work done by old machine = ![\dfrac{1}{4}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B4%7D)
The new machine could shred the same truckload in 2 hours.
Rate of work done by new machine = ![\dfrac{1}{2}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B2%7D)
Let 't' be the time taken by both of them working together , then we have the following equation:-
![\dfrac{1}{t}=\dfrac{1}{4}+\dfrac{1}{2}\\\\\Rightarrow\dfrac{1}{t}=\dfrac{1+2}{4}\\\\\Rightarrow\dfrac{1}{t}=\dfrac{3}{4}\\\\\Rightarrow t=\dfrac{4}{3}=1\dfrac{1}{3}\ \text{ hours}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7Bt%7D%3D%5Cdfrac%7B1%7D%7B4%7D%2B%5Cdfrac%7B1%7D%7B2%7D%5C%5C%5C%5C%5CRightarrow%5Cdfrac%7B1%7D%7Bt%7D%3D%5Cdfrac%7B1%2B2%7D%7B4%7D%5C%5C%5C%5C%5CRightarrow%5Cdfrac%7B1%7D%7Bt%7D%3D%5Cdfrac%7B3%7D%7B4%7D%5C%5C%5C%5C%5CRightarrow%20t%3D%5Cdfrac%7B4%7D%7B3%7D%3D1%5Cdfrac%7B1%7D%7B3%7D%5C%20%5Ctext%7B%20hours%7D)
Since 1 hour = 60 minutes
Then, ![\dfrac{1}{3}\ \text{ hours}=\dfrac{1}{3}\times60=20\text{ minutes}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B3%7D%5C%20%5Ctext%7B%20hours%7D%3D%5Cdfrac%7B1%7D%7B3%7D%5Ctimes60%3D20%5Ctext%7B%20minutes%7D)
Hence, it will take 1 hour 20 minutes to shred the same truckload of paper if Ron runs both shredders at the same time.
Answer:
The answer is 4
Step-by-step explanation:
Because I did it before
Answer:
Step-by-step explanation:
hello :
x² - 6x = 7
x² - 6x+9-9___= 7
(x - 3 )²= __16_
x - 3= +/-_4__
x-3=4__and x-3 =_-4_
Answer:
Roger is the independent variable.
Step-by-step explanation:
The given statement is "Roger is sixteen years old and eats granola bars
He attends P.R
Walker High School."
In the given question, the age of the person given.
Here the age of Roger is the independent variable and amount of granola bar eat is dependent variable.
According to the age of the person the amount of granola bars eat will vary.
So the age of the person is independent variable and granola bar is the dependent variable.
Therefore, Roger is the independent variable.