Answer:
0.225989
Step-by-step explanation:
3x+9+x-11=180
4x-3=180
4x=180-3
4x/4x=177/4x
0.225989
Answer:
=78 degrees
Step-by-step explanation:
complementary angles add up to 90 degrees
A + B = 90
3x + 9 + x - 11 = 90
3x + x + 9 - 11 = 90
4x - 2 = 90
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4x = 90 + 2
4x = 92
x =23
angle A = 3x + 9
= (3 x 23) + 9
= 69 + 9
= 78
