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3 years ago

Using each picture or description of a triangle, write and solve an equation.

Mathematics

1 answer:

3241004551 [841]3 years ago

4 0

Answer:

Step-by-step explanation:

All angles in a triangle add up to 180º, so we can make this equation.

7x-2+5x-10+4x=180

Combine like terms

16x-12=180

Add 12

16x=168

Divide

x=16.5

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3 years ago

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Answer:

Step-by-step explanation:

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case~2

$if~x < 0\\8x^2-5 < 120x\\8x^2-120x < 5\\x^2-15x < \frac{5}{8} \\adding~(-\frac{15}{2} )^2\\(x-\frac{15}{2} )^2 < \frac{5}{8} +(-\frac{15}{2} )^2\\|x-\frac{15}{2} | < \frac{5+450}{8} \\-\sqrt{\frac{455}{8} } < x-\frac{15}{2} < \sqrt{\frac{455}{8} } \\\frac{15}{2} -\sqrt{\frac{455}{8} } < x < \frac{15}{2} +\sqrt{\frac{455}{8} } \\but~x < 0\\7.5-\sqrt{\frac{455}{8} } < x < 0$

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2 years ago

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Answer:

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3 years ago

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