Problema Solution
maria got an average of 73% on her first three tests. the first score is 71%. the second is 4 less than the third one. what did she get on her second and third tests?
Answer provided by our tutors
let
x = the second score
y = the third score
the second is 4 less than the third one:
x = y - 4
maria got an average of 73% on her first three tests:
(1/3)(x + y + 71) = 73
by solving the system of equations:
x = y - 4
(1/3)(x + y + 71) = 73
we find:
x = 72
y = 76
click here to see the step by step solution of the system of equations:
on the second test Maria got 72%.
on the third score Maria got 76%.