Hi,

first four tests, the scores were 75, 90, 73, and 75.

What is the lowest score that the student can get on the last test and still get a B?

to get a B in math,a student must score an average of 80 on five tests.

(75+90+73+75+)/5 ≥ 80

 75+90+73+75+x ≥ 400

    313 + x ≥ 400

          x ≥ 87 

  87 the lowest score that the student can get and still get a B

 

  

Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
 (75+90+73+75+x)/5=80

solve for x

x=87

or

75 misses 80 by -5

90 exceeds by 10

73 -7

75 -5

-5+10-7-5

-7

must get 80+7=87

 

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