A math teacher needs to choose 6 students from class of 30 to go to the library. How many different groups can she select?

Possible answers
A 180
B 427,518,000
C 593,775
D none of the choices are correct

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

Pick the description of a geometric object that best matches the real world object box for a deck of card

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.