Sally is evaluating some test papers. there are 80 multiple choice questions in the test. students get two points for every correct answer and for every wrong answer or any question left blank, one mark is deducted from the total score. mick got 115 points on the test. if x represents the number of questions answered correctly, which equation can be used to find the number of questions he answered correctly? a. x  + (80 +  x) = 115  b.  2x  - (80 -  x) = 115  c.  x  - 115 = 80  d.  x  + 115 = 80