SOLUTION: Roger bought "x" items online for $80 each. Shipping costs were $30
for the first item and $10 for each additional item. Which of the following expressions gives the total amount
Question 1160201: Roger bought "x" items online for $80 each. Shipping costs were $30
for the first item and $10 for each additional item. Which of the following expressions gives the total amount in dollars for the purchase, including shipping costs, based on "x"?
A. 80x + 20
B. 80x + 40
C. 90x + 20
D. 90x + 30
E. 90x + 40 Found 3 solutions by MathLover1, ikleyn, greenestamps:Answer by MathLover1(20850) (Show Source):
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shipping costs were $ for the first item , so if Roger bought one item he would pay $ for shipping
and, if he bought two or more items, there is additional cost of $, so shipping costs would be $
"" items online for $ each:
This problem belongs to a category "Do not believe to your eyes and check yourself thrice".
The correct answer is option C.
T A B L E
x= 1 x= 2
A 100 180
B 120 200
C 110 200
D 120 210
E 130 220
Calculated from the condition: total(x=1) = 110; total(x=2) = 200.
ANSWER. Expression C.
