SOLUTION: A student needs at least 80% of all points on the tests in a class to get a B. There are three 100-point tests and a 250-point final. The student's test scores are 72%, 85% and 78%

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A student needs at least 80% of all points on the tests in a class to get a B. There are three 100-point tests and a 250-point final. The student's test scores are 72%, 85% and 78%      Log On


   

Question 358543: A student needs at least 80% of all points on the tests in a class to get a B. There are three 100-point tests and a 250-point final. The student's test scores are 72%, 85% and 78% for the 100 point tests. What is the least score the student can make on the final and still get a B?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

Lt x represent the % score on the last test.

student needs at least 80% of all points on the tests in a class to get a B

%2872+%2B+85+%2B+78+%2B+x%29%2F4+=+80

235 + x = 320

x = 320-235 = 85

x = 85%  Student needs an 85%  on the last test

250 Question Test

.85*250 = 212.5

Students needs a 'score' of at least 213 on last test