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HELP!

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Find all real numbers t such that $$\frac{2}{3} t - 1 < t + 7 \le -2t + 15$$ Give your answer as an interval.

Jun 5, 2019

#1
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Jun 5, 2019
#2
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What is the symbol $? Why is 15$ and not 15.What is the difference?

Thank you.

Dimitristhym  Jun 5, 2019
edited by Dimitristhym  Jun 5, 2019
#3
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It is leftover from when the asker copy and pasted the question. Other sites use \$'s to enclose latex, but this site does not. The dollar sign shouldn't be there.

hectictar  Jun 5, 2019
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Aha ok thank you I was wandering if it was a mathematical symbol witch I didn't know.

Dimitristhym  Jun 5, 2019