Question

Please help me with hw​

Answer 1

4. 7 hours 6. 8.57

Explanation:

Answer 2

Explanation:

Since, Carlos completes the work in 5 hours.

So, in one hour she will do
`=(1)/(5)` part

Since, Jenny completes the work in 9 hours.

So, in one hour she will do
`=(1)/(9)` part

(Carlos + Jenny)'s one hour work together

`=(1)/(5)+(1)/(9)\\</p><p></p><p>= (9+5)/(5* 9)\\</p><p></p><p>= (14)/(45)\\`

Total time taken by Carlos and Jenny together
`=(45)/(14)= 3(3)/(14) \: hours`