Answer:
12.5664 units (rounded off to four decimal values)
Step-by-step explanation:
Arc length = 2 × π × r × 
For our partial circle;
The radius (r) = 8 units
The central angle = 90°
Arc length = 2 × π × 8 ×
= 12.5663706144 units
Or 12.5664 units (rounded off to four decimal values)
Answer:HL
Step-by-step explanation:
-5x-3y = -7
5x+3y=7
y=(7-5x):3
1. x=0,=>y=7/3=2 1/3 =>(0;2 1/3)
2.y=0,=>(7-5x)=0,=>x=7/5=1,4 =>(1,4;0)
3.x=1, =>y=2/3,=>(1;2/3)