1. Solve by elimination. 9x – 5 y = -12 -9x + 5y = 12 And show work pls

Mathematics

1 answer:

den301095 [7]4 years ago

3 0

Answer:

9x – 5 y = -12

any point along this line

Step-by-step explanation:

9x – 5 y = -12

-9x + 5y = 12

Add the two equations

9x – 5 y = -12

-9x + 5y = 12

-------------------------

0x + 0y = 0

There are infinite solutions since the y are the same line

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A woman walks due west on the deck of a ship at 3 mi/h. The ship is moving north at a speed of 22 mi/h. Find the speed and direc

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Answer: The speed is 22.2 mi/hr and woman is 8° north relative to the surface of the water.

Step-by-step explanation:

Since we have given that

Speed at which woman walks due west = 3 mi/hr

Speed at which ship moving due north = 22 mi/hr

Now it forms "Pythagorus theorem":

So, it becomes,

$H^2=B^2+P^2\\\\H^2=3^2+22^2\\\\H^2=9+484\\\\H^2=493\\\\H=\sqrt{493}\\H=22.20\ mi/hr$