It should be noted the answer is incorrect for the inequality by checking a number that is less than -20.
Based on the information, we can use -18 to illustrate the information.
This will be:
-10 >= 1/2y - 20 <= y
-10 >= 1/2(-18) - 20 <= -18
-10 >= -9 - 20 <= -18
-10 >= -29 <= -18
Based on the above, it should be noted the error was that the student should have used a number less than 20 as illustrated.
Learn more about inequalities on:
brainly.com/question/11613554
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