Angle a and angle b are complimentary angles.
angle a measures 5x - 10, and angle b measures 3x + 20.
find the measure of angle b.
measure of angle a =
degrees.
measure of angle n =
a
degrees.

Step-by-step explanation:

Complementary Angles sum up to 90°, so set the two expressions equal to 90°:

90° = [3x + 20]° + [5x - 10]°

90° = [10 + 8x]°

-10° - 10°

___________

80° = [8x]°

__ __

8° 8°

[Plug this back into both expressions to get m∠B at 50° and the m∠A at 40°.]

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