Answer:
1050, 1200, 2550 and 5100.
Step-by-step explanation:
If the first number is x then the second is x + 1/7x.
The third = x + x + 1/7x + 300 and the fourth = x + x + 1/7x + x + x + 1/7x+ 300 + 300.
So our equation is:-
8x + 4 * 1/7x + 900 = 9900
60/7 = 9000
60x = 7*9000
x = 1050.
Therefore the 4 numbers are 1050, *1/7*1050 = 1200, 2550 and 5100.
Answer:
or 6/5
Step-by-step explanation:
72/60
= 6/5
= 1 1/5
= 1.2 (in decimal)
Answer:
2665 miles in 13 hours, the rate is 205 mph.
Step-by-step explanation:
410/2 is 205 mph. 205 mph * 13 hours is 2665 miles.
add the 2 numbers and then divide by 2
Working together three workers would take 1 hour 36 minutes to finish the job
<em><u>Solution:</u></em>
Given that first worker can finish the job in 8 hours
So in one hour, first worker can do
th of the work
The second worker can finish the job in 4 hours
So in one hour, second worker can do
th of the work
The third worker can also finish the job in 4 hours
So in one hour, third worker can do
th of the work
<em><u>The three workers working together in 1 hour can do:</u></em>
![\frac{1}{8} + \frac{1}{4} + \frac{1}{4} = \frac{1 + 2 + 2}{8} = \frac{5}{8}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B8%7D%20%2B%20%5Cfrac%7B1%7D%7B4%7D%20%2B%20%5Cfrac%7B1%7D%7B4%7D%20%3D%20%5Cfrac%7B1%20%2B%202%20%2B%202%7D%7B8%7D%20%3D%20%5Cfrac%7B5%7D%7B8%7D)
The three worker can thus do
th of the work in one hour
Hence the three of them together can finish the work in
hours
hours
Thus working together three workers would take 1 hour 36 minutes to finish the job