Ahmad and Kumar together can paint a house in 12 days. Kumar and Chong beng together can complete the same job in 15 days while Ahmad and Chong beng together will take 20 days to paint the same house. How many days will it take Ahmad, Kumar and Chong beng to complete the job together?
The trick (SOP) for work problems is that we reduce the work to unit rate.
Ahmad and Kumar together can paint a house in 12 days.--->Ahmad and Kumar together can paint 1/12 the house in 1 days.
A+K = 1/12 of house in a day
K+C= 1/15 of house in a day
A+C= 1/20 of house in a day
Adding all together
2(A+K+C) = 1/12+1/15/+1/20 = 1/5 in a day
A+K+C = 1/10 in a day
So they take 10 days to finish the job together.
Well lets set up an equation 2 problems per second yields

for every second, x.
Now if we want the problems solved, y it will be equal to this product so

Now lets plug in 60 seconds, which is 1 minute

It can solve 120 algebra problems in 1 minute.
Answer:
slope= 5/4
Step-by-step explanation:
The slope equation is (change in y)/(change in x), so you can take two points and use the equation.
There is no proportion showing
Answer:
Step-by-step explanation:
Exact form: 23/20
Decimal form: 1.15