Heather made an 82% on her first test. What must she get on her next test to have an average of at least 90%? (assume 100 points per test). (This also has to be done algebraically).
There are two scores to average to 90 %
(82 + x )/2 = 90
82+x = 180
x = 98 She has to make at least 98 % on the second test.
(red edited)