The answer is 30
2 * 15 = 30
5 * 6 = 30
30 is between 24 and 34
Answer:
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Step-by-step explanation:
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