The 984 km trip takes a plane 2 hours and 24 minutes when flying against the wind. The same trip takes 1 hour and 36 minutes with the wind. How fast would the plan be in still
air?

2 hours.

Step-by-step explanation: The wind adds 24 minutes of flying time when going against it, and takes 24 minutes going with it.

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or