Bob sold some pens at $13 each and 10 correction tapes at $1.20 each. Ted sold the same number of pens at $12.50 each and 10 correction tapes at $1.55 each. They collected the same amount of money. How many pens did Bob sell?
Mr. No Name gets a lot of math questions wrong (it’s great at other subjects). Double-check his answer to be sure.
canned answer is wrong again
13x + 12 = 12.5x + 15.50
.5x = 3.5
x = 7
Bob sold 7 pens
check:
7(13) + 12 =103
7(12.5) + 15.5 = 103
Although I see competent tutors here who were on Jiska (eg mathhelper, the new automatic answer system seems to be a total disaster for the math, physics and chemistry questions that I am accustomed to helping with. More often than not the answers are incorrect but even if correct they are so brief that I can not imagine them being of any use to the student unless a cheater taking a test. This is just insane.
