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Nata [24]
3 years ago
5

What is the solution to x-4y=-5 and -x+6y=7

Mathematics
1 answer:
Triss [41]3 years ago
8 0
<span>  x - 4y = -5
-x + 6y = 7
---------------add
       2y = 2
         y = 1

</span>     x - 4y = -5 
  x - 4(1) = -5 
      x - 4 = -5
           x = -1

answer
x = -1 and y = 1
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According to the fundamental theorem of algebra how many roots exist for the polynomial function f(x)=8x^7-x^5+x^3+6
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Write this statement as a conditional in if-then form:. . All triangles have three sides.. . (1 point). If a triangle has three
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50 POINTS!!! Plz show work questions are in the addon
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1. Each term in this polynomial has a common factor of 3x^3:

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2. Not sure what the "vertical method" is, but I would guess it refers to some way of visualizing the distributive property.

(3x-5)(2x^2+7x-3)=3x(2x^2+7x-3)-5(2x^2+7x-3)

(3x-5)(2x^2+7x-3)=(6x^3+21x^2-9x)+(-10x^2-35x+15)

(3x-5)(2x^2+7x-3)=6x^3+11x^2-44x+15

3. You can use the same approach as in (2), or recall that (a+b)^2=a^2+2ab+b^2:

(5x-4y)^2=(5x)^2+2(5x)(-4y)+(-4y)^2

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(2x^2-7)(2x^2+7)=4x^4-49

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