Trinda score 72,67,82, and 79 on her algebra tests . use an inequality to find the minimum score she can make on the final exam to pass the course with an average of 80 or higher

(72+67+82+79+f)/5 >=80   to find the average we add up all the scores and divide by the number. she took 4 tests plus the final which is 5.  It must be greater than or equal to 80

(300+f)/5>=80  added up the test scores

300+f >= 400  multiply each side by 5

f>= 100  subtract 100 from each side

Trinda needs 100 or greater