Brian is participating in a 5-day cross-country biking challenge. he biked for
50, 63, 68, and 64 miles on the first four days. how many miles does he need to bike on the last day so that his average (mean) is 59 miles per day?

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?