Primitevly do it like:
6v-13v-18=-81
- 7v= -63
v=9
P.S Strongly recommend to learn algebra's basics
Answer:
b
Step-by-step explanation:
Answer: The area of the sector formed by central angle AOB is 5/8 th of the total area of the circle.
Step-by-step explanation:
Let r be the radius of the circle having the center O,
⇒ The area of the circle =
square unit.
And, the central angle AOB = 
( since,
= 180° )


Hence, the area of sector AOB

square unit.
Now,


⇒ Area of sector AOB = 5/8 × Area of the circle.
Hence, the area of the sector formed by central angle AOB is 5/8 th of the total area of the circle.
Answer:
4.5 step by step
Step-by-step explanation:
6 × 6 = 36 ÷ 8 = 4.5
0.25 in a fraction would be 1/4