SOLUTION: you have 46 minutes to take an exam of 28 questions. after you finish the first 12 questions you realize you must answer the remaining questions twice as fast to finish the exam. h

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Question 923450: you have 46 minutes to take an exam of 28 questions. after you finish the first 12 questions you realize you must answer the remaining questions twice as fast to finish the exam. how many questions per minute were you answering?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
you have 46 minutes to take an exam of 28 questions.
after you finish the first 12 questions you realize you must answer the remaining questions twice as fast to finish the exam.
how many questions per minute were you answering?
;
let x = no. of minutes per question for the 1st 12 question
then
.5x = no. of minutes per question for the last 16 questions
:
12x + 16*.5x = 46
12x + 8x = 46
20x = 46
x = 46/20
x = 2.3 min per question for the first 12 questions
and
.5(2.3) = 1.15 min per question for the last 16
:
But they want " how many questions per minute were you answering?"
1%2F2.3 = .4348 question per min