How many quarter pound burgers can george make out of 3 1/2 pounds of ground beef ?

If you take it down to the unit rate George would be able to make 4 quarter pound burgers for every pound (because a quarter is one fourth) you can display this as 4/1 multiply the top and bottom by 3 and get 12/3 meaning George can make 12 out of 3 pounds and the 1/2 pound would be equivalent to 2 fourths or in this case 2 more quarter pound burgers add it to the 12 and the final answer would be 14.

If this is the question f(x)= -x2 +4x-3 f(-1)= )2 +4 (-1)-3 =2-4-3 f(-1) =-5