Differential Equation

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Type the correct answer in each box. spell all words correctly. a sequence of transformations maps ∆abc onto ∆a″b″c″. the type of transformation that maps ∆abc onto ∆a′b′c′ is a . when ∆a′b′c′ is reflected across the line x = -2 to form ∆a″b″c″, vertex of ∆a″b″c″ will have the same coordinates as b′.

If the scale factor between two circles is 2x/5y what is the ratio of their areas?