Tons needed to unload a freight train= 21×2.5 =52.5
number of 3.5-ton payload trucks needed to unload a freight train=52.5÷3.5 = 15
15 Trucks , Each With A 3.5-Ton Payloaf , Would be Needed To Do The Same Job.
Answer:
x+y = 3
3x-y = 5
Step-by-step explanation:
x+y = 3
3x-y = 5
This system of equation will give the points(2,1).
Lets substitute the values x=2 and y = 1 in the equations:
x+y=3 equation 1
2+1 =3
3=3
3x-y=5 equation 2
3(2)-1=5
6-1=5
5=5
Lets solve the system:
Add the equations to eliminate y from the system:
x+y = 3
3x-y = 5
_______
4x = 8
Now divide both the sides by 4
4x/4 = 8/4
x=2
Now substitute the value of x in equation 1:
x+y=3
2+y=3
Combine the constants:
y=3-2
y=1....
Answer:
On 5 liters of petroleum he can go 100km.
He needs 37.5 liters of petroleum to go 750km.
Step-by-step explanation:
He goes 20km on 1 liter. Now we must find how far he can go on 5 liters.
1 * 5 = 5
20 * 5 = 100
The reason we multiplied was because we had to multiply 1 by 5 to get the number of liters of petroleum and what you to one side you must do to the other.
To find how many liters are needed to go 750km you must divide:
750/20 = 37.5
He needs 37.5 liters of petroleum to travel 750km.
Hope this helps! :)
