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Inequalities: Simultaneous Inequalities

If $$3 \le x \le 21$$ and $$7 \le y \le 13$$, then what is the range of the possible values of $$x+y$$?

Incorrect. [[snippet]]

Correct. [[snippet]] Subtract the smallest value of $$x+y$$ ($$3 + 7 = 10$$) from the largest value of $$x+y$$ ($$21 + 13 = 34$$). Thus, the range of $$x+y$$ is $$34 - 10 = 24$$.

Incorrect. [[snippet]] This is the range of $$y$$.

Incorrect. [[snippet]] This is the range of $$x$$.

Incorrect. [[snippet]]