Question
it takes sam 4 hours to rake the front lawn, while his brother, dave, can rake the lawn in 2 hours. how long will it take them
to rake the lawn working together?
wwe, a ake the love in 2 hours. how long wait take them

3 hrs

Step-by-step explanation:

Thinking process:

Time taken by Sam = 4 hours

Time taken by Dave = 2 hours

Raking the lawn together will take them half the time each takes, so:

Sam =

       = 2 hrs

Dave =

         = 1 hr

Adding the hours gives = 2 + 1

                                        = 3 hrs

correct answers below:

(w – 2.5)(w + 2.5)

(–4v – 9)(–4v + 9)

step-by-step explanation: