If there are 15 cats in the apartment complex how many dogs are there

Can any one me with the answers to these questions asap?

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?

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons