2 years ago

Does anyone know the answer to this?!

Mathematics

1 answer:

AURORKA [14]2 years ago

4 0

Answer:

65 degrees

Step-by-step explanation:

85 + 30 = 115

180 - 115 = 65

Verify:

a + b + c = 180

85 + 30 + 65 = 180

180 = 180

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$(x - 3)(x + 5) \leqslant 0 \\ \begin{cases}x - 3 \geqslant 0 \\x + 5 \leqslant 0 \end{cases} \: \vee \: \begin{cases} x - 3 \leqslant 0\\x - 5 \geqslant 0 \end{cases} \\ \Leftrightarrow \begin{cases}x \geqslant 3 \\ x \leqslant - 5\end{cases} \: \vee \: \begin{cases}x \leqslant 3 \\x \geqslant + 5 \end{cases} \\ \Leftrightarrow x\in\emptyset \: \vee \: - 5 \leqslant x \leqslant 3 \\ \Leftrightarrow - 5 \leqslant x \leqslant 3$