I need help and it’s past due Big points

Which letters from the table represent like terms? a and b b and c a and d b and d

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Merrida uses a pattern in the multiplication table below to find ratios that are equivalent to 7: 9. if merrida multiplies the first term, 7, by a factor of 6, what should she do to find the other term for the equivalent ratio? multiply 9 by 1. multiply 9 by 6. multiply 9 by 7. multiply 9 by 9.