Let X be chickens
Let Y be pigs,
then x+y=13
the animals have 2x+4y legs,
so 2x+4y=40
The system of the equations
[X+y=13
[2x+4y=40
Divide the second equation by 2
[x+y=13
[x+2y=20
subtract the first equation from the second one
y=20-13
y-7 pigs
substitute y=7 into the first equation
x+7=13
x=13-7
x=6 chickens
Answer : 7.2 hours
Step by Step Explanation: 12 divided by five equals 2.4
2.4 times 3 equals 7.2
Answer:
m = 7 - 3n
Step-by-step explanation:
m + 3n = 7
subtract 3n from both sides
m + 3n = 7
- 3n -3n
m = 7 - 3n
Jones takes 8 hours , therefore in one hour he paints a fraction of 1/8
smith takes 6 hours, thus in one hour he paints a fraction of 1/6
When working together they paint a fraction of 7/24 in an hour.
After 2 hours they will have painted a fraction of (7/24) ×2 = 7/12
The remainder will be 5/12 which will be undertake by smith alone.
Smith will therefore take 5/12 ×6/1 = 2.5 hour or 2 hours 30 minutes
So u have to rewrite it 10^3=x x= 1,000 because 10^3=1,000
