Answer: 70.
- A 70
- B 65
- C 60
- D 75
Correct answer: A. 70
Explanation: Let third score be x. (62+48+x)/3 >= 60, so 110+x >= 180, x >= 70.
One-variable inequalities use open (excluded) or closed (included) circles on a number line; two-variable inequalities use a dashed (strict) or solid (non-strict) boundary line, with the solution being the entire shaded half-plane on one side of it.
Concept context
Solving linear inequalities in one and two variables algebraically and graphically, and representing solutions on a number line or as a region in a plane.