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