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2 years ago

12

What is -√64/9???????????????

1 answer:

SashulF [63]2 years ago

3 0

$- \sqrt{ \frac{64}{9} }=- \frac{ \sqrt{64} }{ \sqrt{9} }=- \frac{8}{3}=-2 \frac{2}{3}$

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2 years ago

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2 years ago

In a race from point X to point Y and back, Jack averages 30 miles per hour to point Y and 10 miles per hour back to point X. Sa

svlad2 [7]

Answer:

Sandy will finish the race first.

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$Speed =\frac{Distance}{Time}$

$\implies Time =\frac{Distance}{Speed}$

Since, from point X to point Y and back, Jack averages 30 miles per hour to point Y and 10 miles per hour back to point X.

So, the total time taken by Jack = $\frac{D}{30}+\frac{D}{10}$

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$=\frac{4D}{30}$

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Also, Sandy averages 20 miles per hour in both directions,

So, the total time taken by Sandy = $\frac{D}{20}+\frac{D}{20}$

$=\frac{D+D}{20}$

$=\frac{2D}{20}$

$=\frac{D}{10}$

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2 years ago