Which phrase describes an unknown or changeable quantity? A. 2 times the number of pages in the book
B. 60 seconds multiplied by 5
C. 3 dollars and 76 cents
D. 15 years of schooling

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

True or false? a circle could be circumscribed about the quadrilateral below.

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′.