A teacher grades students’ tests by subtracting twice the number of incorrect responses from the number of correct responses. If Student A answers each of the 100 questions on her test and receives a score of 70, how many questions did Student A answer correctly?  Choices.
A) 55
B) 90
C) 73
D) 82
E) 91
let the number of correct responses be x   then the number of incorrect responses =100-x   according to question   x-2(100-x)=70 (subtracting twice of incorrect from correct)   3x=270   x=90   ANSWER:90
<result>B</result>
A teacher grades students’ tests by subtracting twice the number of incorrect responses from the number of correct responses. If Student A answers each of the 100 questions on her test and receives a score of 70, how many questions did Student A answer correctly?