3 years ago

Help please! ill mark brainliest!

Mathematics

2 answers:

Natasha_Volkova [10]3 years ago

7 0

Answer:

0.225989

Step-by-step explanation:

3x+9+x-11=180

4x-3=180

4x=180-3

4x/4x=177/4x

0.225989

Gre4nikov [31]3 years ago

4 0

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

collect like valuables

4x = 90 + 2

4x = 92

x =23

angle A = 3x + 9

= (3 x 23) + 9

= 69 + 9

= 78

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