SOLUTION: a student with a 1.875 gpa has 24 credit hours. find how many credit hours of b's (at 3 per credit hour) he will need to raise his gpa to a 2.40

Algebra ->  Equations -> SOLUTION: a student with a 1.875 gpa has 24 credit hours. find how many credit hours of b's (at 3 per credit hour) he will need to raise his gpa to a 2.40      Log On


   

Question 126555: a student with a 1.875 gpa has 24 credit hours. find how many credit hours of b's (at 3 per credit hour) he will need to raise his gpa to a 2.40
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
student with a 1.875 gpa has 24 credit hours. find how many credit hours of b's (at 3 per credit hour) he will need to raise his gpa to a 2.40
:
We can do it this way:
:
Let x = no. of credit hrs required at 3.0
:
%28%281.875%2824%29+%2B+3x+%29%29%2F%28%28x%2B24%29%29 = 2.4
%28%2845+%2B+3x+%29%29%2F%28%28x%2B24%29%29 = 2.4
Multiply both sides by (x+24)
45 + 3x = 2.4(x+24)
:
45 + 3x = 2.4x + 57.6
:
3x - 2.4x = 57.6 - 45
:
.6x = 12.6
x = 12.6%2F.6
x = 21 credit hrs at 3.0
:
:
Check solution:
%28%2845+%2B+3%2821%29%29%29%2F%28%2824+%2B+21%29%29 =
108%2F45 = 2.4