Carol H. answered 10/11/18
Tutor
4.9
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Masters' Degree in Mathematics with 35 years Teaching Experience.
Let x = the measure of <B
Let 2x - 15 = the measure of <A
x + 2x - 15 = 90
3x = 105
x = 35 degrees = m<B
m<A = 2x - 15 = 70 - 15 = 55 degrees