Answer:
I used this converter, very helpful
Step-by-step explanation:
Answer:
It was a 25% discount
Step-by-step explanation:
25 percent of 20 is 5. You subtract 5 from 20 and get 15.
I hope this helps.
Answer: 6 students
What we know:
Students: 24
Students who play checkers: 
Students who also play sudoku:
of the 
24 ÷ 3 = 8, so 8 × 2 = 16 (students who play checkers)
× 2 = 
So the answer is,
6 students play both checkers and sudoku
It should be 6, radius is half of the circumference (6/3=2).
To find the are of a square, we simply square the value of a side
so..

Area = 25 square units