A walli can be built by 6 men working for 8 hours per day in 5 days. How many days will it take 4 men to build if they work only 5 hours per day. (show your working)

A wall can be built by 6 men working 8*5*6=240 hours.

If 4 men works 5 hours a day, they work 20 hours/day.

It will take them 240 hours /20 hours = 12 days

Step-by-step explanation:

Please help me ASAP!

50 Points for Correct answer!!

Quadrilateral WXYZ is on a coordinate plane.

Segment XY is on the line x - y = -3, and segment WZ is on the line x - y = 1. Which statement proves how segments XY and WZ are related?

A: They have slopes that are opposite reciprocals of 1 and -1 and are, therefore, perpendicular.

B: They have the same slope of 1 and are, therefore, parallel.

C: They have slopes that are opposite reciprocals of 0 and undefined and are, therefore, perpendicular.

D: They have the same slope of -1 and are, therefore, parallel.

x-y = -3  => y = x+3...........(1)  => slope = coefficient of x = 1

x-y = 1  => y = x-1 ..............(2) => slope = coefficient of x = 1

Therefore the correct statement is

They have the same slope of 1 and are, therefore, parallel.

(see also graph, attached)