Respuesta :

Answer:

B. 50°

Step-by-step explanation:

70° and m<1 are Complementary Angles, meaning they add up to 90°, so, m<1 is 20°. Now, m<3 is also 70° because they are Alternative Angles, meaning that they are reflexive. Now you can perform your deduction:

70 - 20 = 50

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