Find the sum of 2√5 and 3√5

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?

Percent increase and decrease. original number: 45 new number: 18

When solving a logarithm equation, how do you find the missing variable ?