Tania has a set of nesting rings. This table shows the relationship between the radius of a ring and the ring's circumference. What is the circumference for the nesting ring with a 9.5 cm radius?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.