Mathematics: Chiara rode herbicycle 18.2 km in 1.4 hours. she determines that her mean speed was less than 17 km per hour for this trip. is she correct?

Chiara rode herbicycle 18.2 km in 1.4 hours. she

Ответ:

brandonleekenyon

02.06.2023

Mathematics

Hi there!

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I believe your answer is:

$\text{A) }\frac{-7}{9}$

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Here’s why:

We can apply the rules for products and quotients of values with different signs. If the signs of two numbers are the same, then the product/quotient would be positive. If the signs are different, the sign of the product/quotient would be negative.

⸻⸻⸻⸻ $\boxed{\text{Equivalent Faction}}\\\\\rightarrow \frac{7}{-9}= -0.77777...... \leftarrow\\\\------------\\\text{Option A: } \frac{-7}{9} = -0.77777......\\\\\text{Option B: } \frac{-7}{-9}= 0.77777......\\\\\boxed{\text{Recall that if two numbers have the same sign then the product or quotient would be positive.}}\\\\\text{Option C: }\frac{7}{-(-9)}=\frac{7}{9} = 0.77777......\\\\\text{Option D: } \frac{-(-7)}{9}=\frac{7}{9} = 0.77777......$ ⸻⸻⸻⸻

Option A's fraction is equivalent.

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Hope this helps you. I apologize if it’s incorrect.

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Chiara rode herbicycle 18.2 km in 1.4 hours. she determines that her mean speed was less than 17 km per hour for this trip. is she correct?

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