by triangle angle addition law
a + b + c = 180
3x +1 + 2x-1 +40 = 180
5x +40 = 180
5x = 180 - 40 = 140
x = 140/5 = 28
so
b = 2x -1 = 2×28-1= 56-1 = 55
Answer:
40
Step-by-step explanation:
8 muffins=1 cup of flour.
8 muffins × 5 cups = 40
21 square cm
B
Step-by-step explanation: apex
