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Snowcat [4.5K]
3 years ago
14

Substances that are made of just one kind of atom are ____ .

Mathematics
1 answer:
makvit [3.9K]3 years ago
5 0
Elements, they’re a pure substance and can’t be broken down into simpler substances.
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Find the measure of two supplementary angles, ∠A and ∠B, if m∠A = (3x – 7)° and m∠B = (2x + 2)°. =180
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Answers:

Angle A = 104 degrees

Angle B = 76 degrees

=================================

Supplementary angles add to 180 degrees.

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5x-5+5 = 180+5 ... add 5 to both sides

5x = 185

5x/5 = 185/5 .... divide both sides by 5

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Use x =37 to find

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Angle B = 2x+2 = 2*37+2 = 74+2 = 76 degrees

As a check: A+B = 104+76 = 180 so that helps confirm the answer

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