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Vesna [10]
2 years ago
15

Please help!!!!!!!!!!

Mathematics
1 answer:
MatroZZZ [7]2 years ago
7 0

Step-by-step explanation:

Left side: 18cm

Under that: 5cm

5cm again

Perimeter = 76

Because: 20 + 18 + 18 + 5 +5 +5 +5 = 76

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8 0
3 years ago
Please help domain/range and eqation
Elena-2011 [213]
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(2x+3y+4z)(4x^2+9y^2+16z^2-6xy-12yz-8zx)
erma4kov [3.2K]
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Thoughtfully split the expression at hand into groups, each group having two terms :

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Pull out from each group separately :

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Looking for common sub-expressions :

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olya-2409 [2.1K]
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\\\\&#10;\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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