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zepelin [54]
2 years ago
11

15 men can do a piece of work in 80 days. If 5 more men are added, how long will it take to complete same piece of work?​

Mathematics
1 answer:
tresset_1 [31]2 years ago
4 0

Answer:

Step-by-step explanation:

This is an inverse proportion.

men = k / Time         So first we need to find k

k = men * Time         Substitute values

k = 15*80

k = 1200  Notice the units are man days.

Now what happens if we increase the number of men to 20? What happens to the number of days.

20 = 1200 / time          Multiply both sides by time

20*time = 1200            Now divide by 20

time = 1200/20

Answer: time = 60 days

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Write an equation for a line that is parallel to y + 5 = 3(x - 1) and goes through the point (3,-4)
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Answer:

The  equation for a line that is parallel to y + 5 = 3(x - 1) and goes through the point (3,-4) will be:

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Step-by-step explanation:

Given the equation

y + 5 = 3(x - 1)

Writing in the slope-intercept form

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We know that the parallel lines have equal slopes.

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Using the point-slope form of the line equation

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y = 3x-9-4

y = 3x-13

Thus, the  equation for a line that is parallel to y + 5 = 3(x - 1) and goes through the point (3,-4) will be:

  • y = 3x-13
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