SOLUTION:

Algebra.Com
Question 1186755:
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(53763)   (Show Source): You can put this solution on YOUR website!
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The problem refers to the graph below, but the graph absents in the post.



Answer by josgarithmetic(39799)   (Show Source): You can put this solution on YOUR website!