(3x+1)+(4x-5)=8x-9
7x-1=8x-9
7x=8x-8
-x=-8
X=8
Answer:
B
Step-by-step explanation:
Since the triangle is right use the tangent ratio to find x
tan64° = =
Multiply both sides by 11
x = 11 × tan64° = 22.55 → B