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sergejj [24]
2 years ago
10

A rectangle has an area of 342 square meters. The width is 2 more than 4 time the length. Find the length and width, in meters o

f the rectangle
Mathematics
1 answer:
Anna35 [415]2 years ago
3 0

Answer:

  • length: 9 m
  • width: 38 m

Step-by-step explanation:

Let x represent the length of the rectangle. The the width is (4x+2) and the area is ...

  x(4x+2) = 342

  2x² +x - 171 = 0 . . . . . divide by 2, rearrange to standard form

  (2x +19)(x -9) = 0 . . . factor

  x = -19/2 or +9 . . . . . the length is the positive solution: 9

  (4x+2) = 4(9) +2 = 38 . . . . find the width from the length

The length of the rectangle is 9 meters. The width is 38 meters.

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Answer:

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Step-by-step explanation:

To find  ∠A first we have to find the length of side B by cosine law:

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