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Rudiy27
3 years ago
8

If f(x)=2x+8 what is f(-1.8)

Mathematics
2 answers:
MatroZZZ [7]3 years ago
5 0
The answer would be f(-1.8)= 4.4

Just substitute x with -1.8

2 times -1.8 equals -3.6 and -3.6 plus 8 equals to 4.4

Hope this helps, please mark brainliest!
scZoUnD [109]3 years ago
4 0
To find this out, you plug it into x
f(x) = 2x + 8 
f(-1.8) = 2(-1.8) + 8
solve
f(-1.8) = -3.6 + 8 
f(-1.8) = 4.4

In other words, -1.8 is the x coordinate and the y coordinate is 4.4
so (-1.8, 4.4)

Hope this helps :)
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Answer:

Step-by-step explanation:

  [1]    3x - 4y = -24

  [2]    -x - 16y = -52

Graphic Representation of the Equations :

   -4y + 3x = -24        -16y - x = -52  

 

Solve by Substitution :

// Solve equation [2] for the variable  x

 [2]    x = -16y + 52

// Plug this in for variable  x  in equation [1]

  [1]    3•(-16y+52) - 4y = -24

  [1]     - 52y = -180

// Solve equation [1] for the variable  y

  [1]    52y = 180

  [1]    y = 45/13

// By now we know this much :

   x = -16y+52

   y = 45/13

// Use the  y  value to solve for  x

   x = -16(45/13)+52 = -44/13

Solution :

{x,y} = {-44/13,45/13}

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3 years ago
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Step by step solution is attached

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So the correct option is D) The variable is discrete because it is countable.

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