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3 years ago

7

Two cars leave from the same point (A) and travel along a straight road, which are at angle of 78° to each other. If their speed

s are 120 km/h (truck) and 90 km/h (car) respectively, how far apart will they be after one half hour?

1 answer:

densk [106]3 years ago

7 0

T=(60cos78, 60sin78)

T=(12.47, 58.69)

C=45

d=√((45-12.47)^2+58.69^2)

d≈67.1km

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LuckyWell [14K]

<h2>The answer is " $-\frac{8}{9} \\\\$ ".</h2>

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$\to \frac{2}{5}n+3-\frac{7}{10}n=\frac{3}{5}-3n\\\\\to \frac{2}{5}n-\frac{7}{10}n+3n=\frac{3}{5} -3\\\\\to n(\frac{4-7+30}{10})=\frac{3-15}{5} \\\\\to n(\frac{-3+30}{10})=\frac{3-15}{5} \\\\\to n(\frac{27}{10})=\frac{-12}{5} \\\\\to n=\frac{-12}{5} \times \frac{10}{27} \\\\\to n=-4 \times \frac{2}{9} \\\\\to n=-\frac{8}{9} \\\\$

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Find out more information about solving here:

brainly.com/question/322601

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