A travel agent offers a vacation plan which costs x dollars for the first day, and x/2 for each additional day.
How much does a vacation of y days cost, where y > 1.
Choose the correct option:  A) yx/2  B) (yx+x)/2  C) (yx+x)/3  D) (yx+x)/5  E) (yx+x)/6
Cost = x + (y-1)*x/2 = (2x + (y - 1)*x)/2 = (yx+x)/2   Answer is (yx+x)/2
<result>B</result>
A travel agent offers a vacation plan which costs x dollars for the first day, and x/2 for each additional day.
How much does a vacation of y days cost, where y > 1.