Question

Need help with 17 to find the angle please explain step by step

Answer 1

(5x-11) + (4x+1) = <ABC

remove parentheses: 5x-11+4x+1

simplify by combining like terms: 9x-10

<ABC = 9x-10

Answer 2

Bisect means to split into 2 equal parts
5x-11=4x+1
Subtract
x-11=1
Add
x=12

Plug it in::
5(12)-11
60-11
49

49 × 2 = 98
<ABC = 98 degrees