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28-08-2020
Mathematics

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CSMedrano CSMedrano

28-08-2020

Answer:

BC=11

Step-by-step explanation:

we need to find BC

and we know that

AB= x+2

AC=13

BC=2x+11

A, B and C are collinear

that means that

AB+BC=AC

x+2+2x+11=13

3x+13=13

3x=0

x=0

so BC=2(0)+11

BC=11

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