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valina [46]
4 years ago
15

Few math questions TIME IS RUNNING OUT!! PLEASE HELP!!!!

Mathematics
1 answer:
olya-2409 [2.1K]4 years ago
3 0
1.

|5+6x|\ \textless \ 13\\\\-13\ \textless \ 5+6x\ \textless \ 13

so

\begin{cases}5+6x\ \textless \ 13\\5+6x\ \textgreater \ -13\end{cases}

Answers B and D.

2.

|x+9|\geq11\\\\x+9\ \textgreater \ 11\qquad\vee\qquad x+9\leq-11\\\\
\boxed{x\geq2\qquad\vee\qquad x\leq-20}

Answer D.

3.

The same as point 2. Answer D.

4.

Answer C.

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Answer:

GIVEN :

Patti is using mental math to evaluate the expression (70 + 12.8 + 30) + 6.1

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