Hi I'm taking a diagnostic test can someone plz help me thank you

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

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?

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?