450 is 75.2% of what number

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

Describe how you can act financially responsible.