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Mathematics

1 answer:

Stels [109]2 years ago

4 0

Hello,

$m(x) = 5x + 4\\n(x) = 6 x-9\\Part\ A:\\(m + n)(x)=m(x)+n(x)=5x+4+6x-9=11x-5\\Part\ B:\\ (m-n)(x)=m(x)-n(x)=5x+4-(6x-9)=5x-6x+4+9=-x+13\\Part\ C: \\(m\ o\ n)(x)=m[n(x)]=m(6x-9)=5*(6x-9)+4=30x-45\\$

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10x - 7y = -18
----------------
35x + 7y = 63 (result of multiplying by 7)
10x - 7y = -18
----------------add
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x = 45/45
x = 1

5x + y = 9
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y = 9 - 5
y = 4

solution is : (1,4)
=========================
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----------------
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4x - 12y = -24 (result of multiplying by 4)
---------------add
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y = -15/-3
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x - 15 = -6
x = -6 + 15
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