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Nikitich [7]
4 years ago
11

Solve this system using substitution:

Mathematics
2 answers:
Sophie [7]4 years ago
8 0

Answer:

Value of x=0

<u>Step-by-step explanation:</u>

Given:

     if y=5

To find:

   16 x-4 y=-20

Solve this system using substitution method and find the value of x

Solution:

The given equation:16 x-4 y=-20

And ify=5  

Substitute the value of y=5 in the above equation, we get

    16 x-4(5)=-20

    16 x-20=-20

    16 x=-20+20

    16 x=0

    x=0

Result:

Value of x=0 and (x, y)=(0,5)

Sholpan [36]4 years ago
5 0

Answer:

16x- 20y=20

Step-by-step explanation:

20y-20y =0

so answer is 16x

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Answer:

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6 0
3 years ago
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3 0
3 years ago
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please help me Which of the following choices will evaluate the function ƒ(x) = -(-x), when x = -3? 3 -1 -3 None of these choice
Vadim26 [7]

Answer:

-3

Step-by-step explanation:

Given the function f(x) = -(-x)

we want to evaluate f(-3)

What we do simply here is substitute the value of -3 for x in the equation

That would be ;

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8 0
3 years ago
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pshichka [43]
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3 0
3 years ago
April is an avid chess player. She sets up a coordinate system on her chess board so she can record the position of the pieces d
NemiM [27]

Answer:

6.7

Step-by-step explanation:

To solve this problem, we need to calculate the distance between two points in the XY coordinate plane.

The formula to calculate this distance is:

d = sqrt(dx^2 + dy^2)

where dx is the difference between the X coordinate of the points, dy is the difference between the Y coordinate of the points, and d is the distance.

(sqrt is the square root of what is in the parenthesis)

The first point (April's king) has X=4 and Y=2, the second point (the opponent's king) has X=7 and Y=8.

So, we have that dx = 4-7 = -3 and dy = 2-8 = -6

Now, we calculate the distance:

d = sqrt[ (-3)^2 + (-6)^2 ] = sqrt(9+36) = sqrt(45) = 6.7082 = 6.7

4 0
3 years ago
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