Shawn and ellie are construction workers. shawn can complete a concrete job in 4 hours, while ellie can complete it in 6 hours. the foreman says that it will take them 5 hours to complete it if they work together. explain each step in solving this equation, and determine if the foreman is correct or not.

The foreman is not correct

Step-by-step explanation:

Shawn: 1 job in 4 hours      ⇒

Ellie: 1 job in 6 hours           ⇒

Together: 1 job in "x" hours ⇒

3x + 2x = 12

        5x = 12

          x = 2.4

Together, they can get 1 job done in 2.4 hours

at home andrea has 1 2/3 kilograms of rice

step-by-step explanation: