SOLUTION: Your grades in the three tests in College Algebra are 89, 64, and 73. A)How many points do you need on the final to average 70? B)If the Final carries double wieght how many poi

Algebra ->  Probability-and-statistics -> SOLUTION: Your grades in the three tests in College Algebra are 89, 64, and 73. A)How many points do you need on the final to average 70? B)If the Final carries double wieght how many poi      Log On


   



Question 398244: Your grades in the three tests in College Algebra are 89, 64, and 73.
A)How many points do you need on the final to average 70?
B)If the Final carries double wieght how many points do you need to average 70

Answer by MathLover1(20855) About Me  (Show Source):
You can put this solution on YOUR website!

89, 64, and 73.
A)How many points do you need on the final to average 70?
%2889%2B+64%2B+73%2Bx%29%2F4=70
89%2B+64%2B+73%2Bx=70%2A4
226%2Bx=280
x=280+-226
x=54

B)If the Final carries double weight how many points do you need to average 70


%2889%2B+64%2B+73%2B2x%29%2F4=70
2x=54
x=27