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anonymous
 one year ago
On a certain multiplechoice test, 9 points are awarded for each correct answer, and 7 points are deducted for each incorrect or unanswered question. Sally received a total score of 0 points on the test. If the test has fewer than 30 questions, how many questions are on the test?
anonymous
 one year ago
On a certain multiplechoice test, 9 points are awarded for each correct answer, and 7 points are deducted for each incorrect or unanswered question. Sally received a total score of 0 points on the test. If the test has fewer than 30 questions, how many questions are on the test?

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DanJS
 one year ago
Best ResponseYou've already chosen the best response.19*(#correct)  7*(#wrong) = 0 given

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1there are two variables there and only one equation, need one more to be able to solve

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Cannot be determined 16 19 21 24

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1If the test has fewer than 30 questions... that is the second given thing

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1Total questions = #correct + #wrong

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1just write it as a ratio 9 correct = 7wrong so the ratio is 9:7 16 parts so 7 correct and 9 wrong

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can we also use 9x7 and 7x9 ?

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1what cambell did was take the first equation that was given.. 9*(#correct)  7*(#wrong) = 0 and solve it as a ratio of correct/wrong

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1and the total correct and wrong has to be less than 30

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1441233943898:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yesssssss because 63 63= 0

DanJS
 one year ago
Best ResponseYou've already chosen the best response.19*(#correct)  7*(#wrong) = 0 you have to have correct = 7 and wrong = 9, otherwise it is not true

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1the correct and wrong answers are worth different points

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yea thats what i did dont u see it?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.09 points for 7 questions which equals to 63 and 7 points for 9 questions which is 63 deducted so total equals 0

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1sorry if i read something wrong... this is the summary of it...second

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1let: #right = R and # wrong = W  given: 9*R  7*W = 0 and R + W < 30  solve for ratio of R vs W from the first equation... \[\frac{ R }{ W }=\frac{ 7 }{ 9 }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yea thats what i did. Thank youuuu =)

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1with having 7 right and 9 wrong, comes out to zero points...

DanJS
 one year ago
Best ResponseYou've already chosen the best response.17+9 is 16 questions... the next choice is 32 questions, but that is too much . 14 right and 18 wrong
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