Answer:
3 days would take the 15 workers to finish the same task
Step-by-step explanation:
- In the questions of doing a job, the number of workers and the time are in an inverse proportional because if the number of workers is increased, then the time of finishing the job will decrease and vice versa
- The relation between the number of workers and the time to finish any job is N × T = K, where, N is the number of workers, T is the time to finish the job, and K is constant
Let us use this relation to solve the question
∵ 5 workers can complete a certain task in 9 days
∴ N = 5 workers and T = 9 days
→ By using the relation above
∴ 5 × 9 = k ⇒ (1)
∵ If there are 15 workers will make the same task
∵ They can finish it in x days
∴ N = 15 workers and T = x days
→ By using the relation above
∴ 15 × x = k ⇒ (2)
∵ k is the same task, then equate the left sides of (1) and (2)
∴ 15 × x = 5 × 9
∴ 15x = 45
→ Divide both sides by 15 to find x
∴ x = 3 days
∴ 3 days would take the 15 workers to finish the same task
Answer: 9,127
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Multiply 1/5 and 4 to get 4/5.
Multiply 1/5 and -3 to get -3/5.
Use the distributive property to multiply 1/7 by 3x-4.
Multiply 1/7 and 3 to get 3/7 & 1/7 × -4 to get -4/7.
Subtract 
from both sides.
Combine 
and 
to get 
.
Subtract 4/5 from both sides.
The least common multiple of 7 and 5 is 35. Convert -4/7 and 4/5 to fractions with denominator 35.
Because 
and 
have the same denominator, subtract them by subtracting their numerators.
Subtract 28 from -20 to get -48.
Multiply both sides by 
, the reciprocal of 
.
Multiply 
by by multiplying the numerator by the numerator and the denominator by the denominator.
Carry out the multiplications in the fraction 
.
Reduce the fraction 1680/1260 to its lowest terms by extracting and cancelling out 420.
Answer
its C, i just answered it
