please help..really hard math question !!?

Question

a student takes a 30 question math test on which she got n questions correct and m questions incorrect and left k questions blank. correct answers are worth 4 point, incorrect answers are worth -1 point, and blank answers are worth 0 points.

what is the total number of possible points the student can recieve?

write an expression to describe the students totalscore as a ratio of total points earned to total points possible


----i tried but im kinda stumped here soo can u please help.. i kno this is an annoying question but i could eally use sum help ..thanx

Answer 1

PART 1:

The total possible points would be if the student got all 30 questions correct, each worth 4 points. That would be 120 points possible.



PART 2:

You are told the student got n questions correct and each is worth 4 points:

--> 4n points (for correct answers)



You are also told the student got m questions incorrect for -1 point each:

--> -1m

(or just -m)



Finally the k questions they didn't answer are each worth 0, so you can ignore that.



Total points scored:

4n - 1m

= 4n - m



The student's total score as a ratio of points earned (4n - m) to points possible (120) would simply be:



Answer:

4n - m

----------

. 120

Answer 2

ok i'm gonna give this a try but i'm warning you it may be totally wrong cuz i'm no mathematician. i think the expression would be 30=4n+1m+0k. 30 is the total questions. 4n is 4 x the # of correct questions. 1m is 1 x the # of incorrect questions and 0k is 0 x the number of questions left blank. i think the total # of points she can get on this test is 120 because its possible for her to get 100% right and its a 30 question test and each correct question is 4 points and 30 x 4 is 120. i hope this right, if not i'm sorry. i don't even know if this is what you were asking lol. good luck.

Answer 3

If its 30 questions, and each correct answer is worth 4 points, 30x4=120. So wouldn't it be 120 possible points?

Answer 4

120

Answer 5

well since 4 points for each correct answer meand that poccible points are 4 X 30 = 120 is max. amt of points student can get.



ratio is : (4n - m + k) (students score) : 120 (points out of)

Answer 6

28

Answer 7

1. 30(4) = 120 possible points

2. (4n-m)/120

Answer 8

i have no idea i am not good at reading or math even that i like math