Answer:
8.4cm
Step-by-step explanation:
In a circle, d = 2r, so d = 2 * 4.2cm = 8.4cm
Answer: 720 ways
Step-by-step explanation:
Given
A train has 1 main engine and remaining 6 train cars
If the engine is always in the front the remaining train cars can be arranged is

Answer: 60 adults and 60 students
Step-by-step explanation:
All you need to do is add all 7 job hours, and divide the total by 7. Your answer should be 7
<span>3(9x-9)=16+3(-2x+9)
27x - 27 = 16 - 6x + 27
27x + 6x = 16 + 27 + 27
33x = 70
x = 70/33
x = 2 4/33
In short, Your Answer would be 70/33 or 2 4/33
Hope this helps!</span>