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lawyer [7]
3 years ago
9

Please help asap!!!!

Mathematics
1 answer:
777dan777 [17]3 years ago
5 0

Answer:

  465.988 mph

Step-by-step explanation:

The two speed vectors form two sides of a triangle. Their included angle is 45°, so the law of cosines can be used to find the resultant magnitude x.

  x^2 = 500^2 +50^2 -2·500·50·cos(45°) ≈ 217,144.66

  x ≈ √217,144.66 ≈ 465.988 . . . . miles per hour

_____

You may find you need to round the answer to the nearest whole number.

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The required expression will therefore be:

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Expression for her total score will be the sum of all the expression above as thus:

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