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Vinvika [58]
3 years ago
6

[HELP PLEASE ALGEBRA] Would the answer only be B?

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
7 0
Hello,

|x+4|=3x-5
if x+4>=0 then
          |x+4|=x+4
          x+4=3x-5
          2x=9
            x=9/2
else
    x+4<0 : x<-4
    |x+4|=-(x+4)
     -(x+4)=3x-5
    -x-4=3x-5
    4x=1
    x=1/4 : to exclude since x<-4
end if


Only one solution : x=9/2
ANSWER B.
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Answer:

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Pachacha [2.7K]

Answer:

a = 9.849

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c = 491.03

Step-by-step explanation:

By using Pythagoras theorem in the right triangle BDC,

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a² = 9² + 4²

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a = 9.8489

a ≈ 9.849 units

By mean proportional theorem,

\frac{\text{DC}}{\text{BD}}=\frac{\text{BD}}{\text{AD}}

AD × DC = BD²

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b = \frac{81}{4}

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AB² = AD² + BD²

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