30 men can do a piece of work in 40 days .how long it take to complete the work if 5 men were reduced

48 days

Step-by-step explanation:

If it takes 30men 40days to complete a task, 1 man takes 30×40= 1200 days

25 men will therefore take 1200/25= 48 days.

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is

whatvare the choices

step-by-step explanation: