Asap. will mark as brainliest what is bc ? enter your answer in the box.

BC = 25 units

Step-by-step explanation:

The triangle is isosceles, so sides AB and AC equal each other.

4x+1=2x+23.

If you subtract 1 from both sides and 2x from both sides you end up with 2x=22.

Divide by 2 and you get x=11.

BC = 3x-8.

Substitute and you get 3(11)-8=33-8= 25 units

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i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer