Three workers can do a job in 28 hours. How many more workers are needed to do this job in 12 hours?
2 answers:
Answer:
It will take 7 workers to do the work in 12 hours.
Step-by-step explanation:
We can use proportion to solve this problem, but first, we need to find out if it is a direct or indirect proportion.
As the number of workers increase the number of hours need to do the work/ the time taken to do the work decreases and as the workers decreases, the time taken to do the work increases, so this is an indirect proportion.
Since its an indirect proportion, the arrangement will be different from that of direct proportion, the values will be arranged such that they will be inverse with each other.
Let x be the number of workers needed to do the job in 12 hours
3 workers = x
12 hours = 28 hours
Cross- multiply
12 x = 84
Divide both-side of the equation by 12
=
x = 7
It will take 7 workers to do the work in 12 hours.
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Answer:
m=2 or y=2x+1
Step-by-step explanation:
first use the y2-y1/x2-x1 formula and then use y=mx+b formula
plug in 3 for y2 and 1 for y1
plug in 1 for x2 and 0 for x1
so ur slope is 2
_______________
for y=mx+b *extra info ig if u need it just incase*
i usually use the first point for this but u can use any one u want
plug in 0 for x
plug in 1 for y
and plug in 2 for m
1=2(0)+b
2*0=0
1=0+b
subtract o on both sides
1=b and b is ur y-intercept
y=2x+1
hope this helps