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Cloud [144]
3 years ago
15

Pleas I don’t know the answer to this question

Mathematics
1 answer:
Ivanshal [37]3 years ago
7 0

Answer:

41

Step-by-step explanation:

Think about this as a triangle: the measurements given are the legs and the diagonal wanted is the hypotenuse. We can assume this is a right triangle so you could use trig if you wanted but can also use the Pythagorean theorem which is way easier in this case.

{a}^{2}  +  {b}^{2}  =  {c}^{2}

{35.7}^{2}  +  {20.1}^{2}  =  {c}^{2}

Rounding to the nearest whole number:

c = 41

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slamgirl [31]

Answer:

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Step-by-step explanation:

You have the following system of equations:

x+2y-z=-3\ \ \ \ \ (1)\\\\2x-y+z=5\ \ \ \ \ \ (2)\\\\x-y+z=4\ \ \ \ \ (3)

First, you can subtract euqation (3) to equation (1):

x + 2y - z = -3

<u>-x +y  -z = - 4 </u>

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Next, you can multiply equation (3) by 2 and subtract it to equation (2):

2[ x -y + z = 4]

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You multiply equation (5) by 2 and sum (5) with (4):

2[ -y  + z = 3]

<u>    3y  -2z= -7</u>

  y  + 0 = -1

Then y = -1

Next, you replace y=-1 in (5) to obtain z:

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z = 2

Finally, you can replace z and y in the equation (3) to obtain x:

x - (-1) + (2) = 4

x = 1

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