An experienced shipping clerk can fill a certain order in 4 hours. a new clerk needs 5 hours to do the same job. working together, how long will it take for them to fill the order?

If they work together, they will take 2  2/9 hours to fill the order

Step-by-step explanation:

An experience clerk can fill a certain order in 4 hours

A new clerk needs 5 hours.

How long will it take for them to fill the order?

The first step, find how much order they can complete in an hour

I will give an experieced clerk as A and the new clerk as B

A can finish 1/4 order in an hour

B can finisih 1/5 order in an hour

Second, if they work together, so

(1/4 + 1/5) order will be done in an hour

1/4 + 1/5 = 5/20 + 4 /20 = 9/20

To complete the whole task, it will take :

= 20/20 or 1 : 9/20

= 1 x 20/9

= 2 2/9 hour

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w