The system ax+by=c has the solution (2,-3) a, b,c, d,e and f are non-zero real numbers. select all the systems of equations with the same solution

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?

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"