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Mathematics 20 Online
OpenStudy (anonymous):

Solve the compound inequality. Write the solution in interval notation. 3x+7 _< -8 and 3x _< 0 The solution set of the compound inequality is ___ type answer in interval inequality

OpenStudy (anonymous):

3x+7 <= -8 3x =< 0 --> x <= 0 3x <= -8 -7 3x <= -15/3 ->x <= -5 => x < -5 Thus x belongs to ( - inf, -5 )

OpenStudy (anonymous):

Let me know if you need more explanation!

OpenStudy (anonymous):

I put in (-inf, -5) into the hw database and it told me wrong

OpenStudy (anonymous):

Did you double check your post? and the way I solved it?

OpenStudy (anonymous):

Yeah, it says the interval notation a parenthesis indicates an open interval which does not include the value, while bracket indicates a closed interval which includes the value.

OpenStudy (anonymous):

Oh, try this ( -inf, 0] U [ 0, -5 )

OpenStudy (anonymous):

It ended up being, (-inf, -5]

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