Try this solution, note, checking was not performed.
Answer:
Step-by-step explanation:
Given that the number of males in the classroom is three more than twice the number of females.
the total number of students is 57
Let x be the no of males then no of females = 
Also we have 3 more than twice no of females as

This equals x

No of males = 39, no of females = 18
The formula for finding the perimeter of a circle is P = 2 x 3.14 x r
The perimeter would be 2 x 3.14 x 14
The perimeter is 87.92 cm
Answer:
The equation you would use is лr² (pi times radius squared).
The area of the stage would be 1963.5 square meters or 625л square meters
1.0 2.39 3.3 4.-17 5.. 15 6. -24 7. 43 8. 39 9. -11 10.-17