The total of three sister's ages is 39. Dina is half as old as Michelle and 3 years younger than Juliette. How old are the sisters

What is the missing constant term in the perfect square that starts with x^2 -20x

Which expressions are equivalent to -6 + 3m

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?