SOLUTION: I been able to solve and graph the problems involving inequalities, but I do not understand this word problem. I would be very grateful if you could help me.Thank you so much the p

Algebra ->  Inequalities -> SOLUTION: I been able to solve and graph the problems involving inequalities, but I do not understand this word problem. I would be very grateful if you could help me.Thank you so much the p      Log On


   

Question 96444: I been able to solve and graph the problems involving inequalities, but I do not understand this word problem. I would be very grateful if you could help me.Thank you so much the problem is below. I think if I knew the solution I could figure it out.

Sam must have an average of 70 or more in his summer course to
obtain a grade of C. His first three test grades were 75, 63, and 68. Write an inequality
representing the score that Sam must get on the last test to get a C grade.
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
%2875%2B63%2B68%2Bx%29%2F4%3E=70
(206+x)/4>=70
51.5+.25x>=70
subtract 51.5 from both sides. .25x>=18.5
divide both sides x>=74
Sam must get a grade greater than or equal to a 74 in order to get a 70 average.
Check:
75+63+68+74/4=70