Answer:
It takes the larger ferry 9 hours and 20 minutes to work alone.
Step-by-step explanation:
If the two ferries work together and transport a day's cargo in 7 hours
And if the larger ferry can transport cargo three times faster than the smaller ferry,
This implies that the speed ratio of the larger ferry to the smaller ferry is equal to 3 : 1
Then the sum of the ratio = 4 (3 + 1)
From the above, it will take the smaller ferry 28 hours to work alone (7 x 4), given its speed proportion of 1: 3.
Therefore, when the larger ferry works alone, it will take it (7 x 4)/3 = 9.33 hours.
9.33 hours = 9 hours, 20 minutes.
Answer:
Option C . 2(5x – 1)
Step-by-step explanation:
we know that
The total number of CDs is equal to the CDs bought by Samuel plus the CDs bought by Joyce.
so
----> expression A
To find out the amount of discount for all of their CDs, multiply the total number of CDs by $2
so
Multiply the expression A by $2
Answer: it is a solution set
Step-by-step explanation:
The given system of simultaneous linear equations is expressed as
7x-3y=6 - - - - - - - - - -1
2x+y=11 - - - - - - - - - - - 2
We would eliminate x by multiplying equation 1 by 2 and equation 2 by 7. It becomes
14x - 6y = 12
14x + 7y = 77
Subtracting, it becomes
- 13y = - 65
Dividing the left hand side and the right hand side of the equation by - 13, it becomes
- 13y/13 = - 65/- 13
y = 5
Substituting x = 5 into equation 2, it becomes
2x + 5 = 11
Subtracting 5 from the left hand side and the right hand side of the equation, it becomes
2x + 5 - 5 = 11 - 5
2x = 6
Dividing the left hand side and the right hand side of the equation by 2, it becomes
x = 6/2 = 3
Answer: 45mph
Step-by-step explanation: to solve this, all you have to do is add all of your data, and divide it by the number amount of data you have
Subtract 2x. (It would look like 4y=-2x+10
