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3 years ago

Which number line correctly shows 0.8 + 0.3?

Mathematics

2 answers:

GenaCL600 [577]3 years ago

8 0

Answer:

B. Is the correct way to show the problem.

Step-by-step explanation:

A: The number line is useless. It shows working backwards from the answer. You want to show how the answer was obtained. + goes right - goes left. Not A. This actually shows 1.1 - 0.8 - 0.3

C: C shows 0.8 - 0.3. Remember + goes right - goes left.

D: D is wrong. It shows 0.3 to 1.1 and then 0.3 back to 0.8. You are not doing that.

worty [1.4K]3 years ago

6 0

Answer:

Step-by-step explanation:

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Answer:

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Answer:

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Step-by-step explanation:

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As both $sin\,\theta$ ,

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In the third quadrant,

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$\sin\,\theta =-\sqrt{1-\cos^2\,\theta} \\=-\sqrt{1-(\frac{-2}{5})^2 } \\\\=-\sqrt{1-\frac{4}{25} }\\\\=-\sqrt{\frac{25-4}{25} }\\\\=-\frac{\sqrt{21} }{5}$

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