Question

What is ​ BC ​ ? Enter your answer in the box. Units An isosceles triangle A B C. Side B C is the base. Sides A B and A C are equal. Sides A B and A C are labeled with single tick marks. Side A B is labeled as 4 x plus 1, side A C is labeled as 2 x plus 23, and side B C is labeled as 3 x minus 8.

Answer 1

Answer:

BC = 25

Step-by-step explanation:

Since AB = AC, then substituting values gives

4x + 1 = 2x + 23 ( subtract 2x from both sides )

2x + 1 = 23 ( subtract 1 from both sides )

2x = 22 ( divide both sides by 2 )

x = 11

Hence

BC = 3x - 8 = (3 × 11) - 8 = 33 - 8 = 25