Sam wants to earn at least a B in Math. If he earned the following percents 100, 82 ,70 , 72, 80. What is the minimun grade Sam must earn in order to keep a B average? (Hint: grade b is an 80 an greater an less than a 90 )
A: write an solve an algebraic inequality . Show all your work
B:answer the question in the problem an label.