Applications of Solving Equations
Problems
Problem : What number must be added to the set {2, 6, 12, 0} to yield an average of 6?
Problem : What number must be added to the set {7, -7, 15} to yield an average of -5?
Problem : Jonah receives the following scores on his biology tests:
{95, 99, 92, 89}
.
a) If
100
is the highest grade possible on a test, and there is one test left, what is the highest average Jonah can get?
b) What is the minimum score he needs on the final test to get an A (at least
90
average) in the class?
Problem : Kat receives the following scores on her chemistry tests:
{88, 92, 74, x, 94, 85}
.
a) If
x = 80
, what is Kat's average?
b) If Kat's average is
83
, what is
x
?
c) If the highest possible score on a test is
100
, can Kat get a
90
in the class?
