muge2247 muge2247 29-12-2023 Mathematics contestada ΔABC is an isosceles triangle with AB = BC. If m∠A = (6x - 5y), m∠B = (4x + 15y), and m∠C = (10x), find m∠B. A. (6x + 5y) B. (4x - 15y) C. (4x + 15y) D. (10x)