(x² + 6x - 2) remainder of expression is divided by (x+1)

The verbal translation for the difference of m and 7 increased by 15

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?

Is the square root of 4 plus the square root of 16 rational?