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aivan3 [116]
3 years ago
14

A boat attempts to sail due east at 15km/h, but is taken off course by a current of 5 km/h flowing in the southwest direction. F

ind the resultant speed of the boat and the bearing on which it travels.
Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
8 0

Answer:

Resultant speed = 12 km/h.

Bearing is 107.14 degrees.

Step-by-step explanation:

This can be represented by a triangle of velocities with lengths 15 and 5 with the included angle = 45 degrees.

To find the velocity of the resultant  we use cosine rule:

v^2 = 15^2 + 5^2 - 2*5*15cos 45

v^2 = 143.934

v = 12.0 km/h to the nearest tenth.

To find the bearing we use the sine rule to find the angle down from due east>

12 / sin 45 = 5/ sin x

sin x =  5 sin 45 / 12 = 0.2946278

x = 17.14 degrees.

Bearing is therefore 90 + 17.14 = 107.14 degrees.

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Is from O to C 14m

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Area of triangle A= 1/2bh. .5x28x14=196

307.72-98=196= 111.72 m^2

Step-by-step explanation:

3 0
3 years ago
If the points (–2, –1), (–1, 0), (2, 3), and (–3, –2) are joined to form a straight line, at what point does the line intersect
Snowcat [4.5K]

Answer:

0

Step-by-step explanation:

Pick 2 points and use the slope formula

(–1, 0), (2, 3)

Slope =(y2−y1)/(x2−x1)

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Hope this helps! Plz award Brainliest : )

5 0
3 years ago
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fenix001 [56]

\frac{59  + x}{2}  = 78 \\ 59 + x = 156 \\ x = 97

Answer: VW=97

5 0
3 years ago
1) The width of a rectangle is 6 meters less than its length. The area is 315 square meters. Find the length of the
Gre4nikov [31]

Answer:21

Step-by-step explanation:

x=length

x(x-6)=315

x^2-6x=315

x^2-6x-315=0

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3 0
3 years ago
8 – 6 ∙ 4 + 10 ÷ 2 =
igor_vitrenko [27]

Answer:

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Step-by-step explanation:

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