Option B. 55° is the correct answer
Step-by-step explanation:
"The sum of interior angles of a triangle is always 180°"
Given
m∠A=(3x+1)°
m∠B=(2x-1)°
m∠C = 40°
We know that
m∠A+m∠B+m∠C=180°
Putting the values of angles

Subtracting 40 from both sides

Dividing both sides by 5

We have to find Angle B,
So
m∠B = 2x-1 = 2(28)-1 = 56-1 = 55°
Hence,
m∠B=55°
Option B. 55° is the correct answer
Keywords: Triangle, Interior angles
Learn more about triangles at:
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Answer:
x = (180 - 68) / 2
Step-by-step explanation:
x = 56°
Answer:
ok more info please and I can help
Answer:
23
Step-by-step explanation:
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Answer:
5y2 + 4y - 12 + 6x
Step-by-step explanation:
3y2 + 2y2 + 8y - 12 + 6x