Please help Round 0.206896552 to the nearest tenth as a percentage

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Find the value of x for which the lines are parallel.

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?