Martin is considering the expressions 1/2(7x + 48) and -[1/2x - 3]+ 4(x + 5). he wants to know if one expression is greater than the other for all values of x. write a new expression that always has a greater value than both of these expressions.

Part A
 The first thing we must do for this case is to rewrite both expressions.
 We have then:
 1/2 (7x + 48) = (7/2) x + 24
 - [1 / 2x - 3] + 4 (x + 5) = - (1/2) x + 3 + 4x + 20 = (7/2) x + 23
  
 We note that the first expression is greater than the second for all values of x. 
 Part B:
 A new expression that is greater than both written expressions is:
 (7/2) x + 25
 For all values of x, this expression is always greater.
 
 (7/2) x + 25

I would say it is y = -2x + 5