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Dr Smith's chemistry midterm has 60 questions She scores the test as follows for each correct answer she gives 2 points for each incorrect answer she subtracts 23 of a point for unanswered?
Wiki User
∙ 15y ago
Dr. Smith's chemistry midterm has 60 questions. She scores the test as follows: for each correct answer, she gives 2 points; for each incorrect answer, she subtracts 2/3 of a point; for unanswered questions, she neither gives nor subtracts points. If Andrew scored a 68 and did not answer 2 of the questions, how many questions did he answer correctly?
Wiki User
∙ 15y ago
Wiki User
∙ 15y agoLet C = Correct
Let I = Incorrect
Let N = None
68=(C*2)+[I*(-2/3)]+(N*0)
Suggested answer:
C=40
I=18
N=2
Check:
C+I+N=60
68=40*2 + 18*(-2/3) + 2*0 => 68=80-12+0 => 68=68
Add your answer:
Earn +20 pts
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What is a reagent blank?
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Where do gases exchange?
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What is a computer that adds and subtracts?
A calculator.
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It adds and subtracts numbers.
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155
What is One half subtracts 1 twelfths?
a number
What is the rule in comparing a set of fractions?
the top adds what the bottom adds. the top subtracts what the bottom subtracts. the top divides what the bottom divides. the top multiplies what the bottom multiplies.
What times what equals 252 but subtracts to 29?
36 and 7
What happens when someone adds carries or subtracts?
An arithmetic operation happens.
Which two numbers subtracts to give 6?
How about: 10-4 = 6
What multiplies to 20 and adds or subtracts to -8?
12
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The force of Buoyancy subtracts from the gravitational weight.
What formula subtracts liabilities from asset will provides what?
Net Worth- Guillermo Peralta.
