momo121003
momo121003 momo121003
  • 11-12-2019
  • Mathematics
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What is BC?

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_units

What is BC Enter your answer in the box units class=

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gmany
gmany gmany
  • 11-12-2019

Answer:

BC = 25

Step-by-step explanation:

It's an isosceles triangle (congruent angles ∠C ≅ ∠B).

Therefore AC = AB.

We have the equation:

[tex]4x+1=2x+23[/tex]        subtract 1 from both sides

[tex]4x=2x+22[/tex]       subtract 2x from both sides

[tex]2x=22[/tex]          divide both sides by 2

[tex]x=11[/tex]

Substitute the value of x to the expression BC = 3x - 8:

[tex]BC = 3(11) - 8=33-8=25[/tex]

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