If a shape is a square, then the shape is a rectangle. If a shape is a rectangle, then the shape has four sides.

If a shape has four sides, then the shape is a quadrilateral.

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

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.