Answer:
6. r = 21 cm
7. A = 155.5 m²
Step-by-step explanation:
7: Formula for arc length is;
S = (θ/360) × 2πr
We are given;
S = 51 cm
θ = 139°
Thus;
51 = (139/360) × 2π × r
Making r the subject;
r = (51 × 360)/(2π × 139)
r ≈ 21 cm
8) Area of sector is gotten from the formula;
A = (θ/360) × πr²
A = (220/360) × (π × 9²)
A = 155.5 m²
Answer:
he needs to play 24 games of basketball
Answer= 60
-10w =-10 • w, w=-6
-10•-6
60. You don’t include the negative because a negative times a negative= positive
Step-by-step explanation:
If 20 labourers=10 days
x labourers = 25 days
10x= 25×20

Cancelling out by 10 on both sides

Therefore, it takes 50 labourers to complete the work at the same rate in 25 days.
Seven, because 6.7 rounded to the nearest whole number is 7.