Ms. berkin is dividing her 4 1/2-foot by 6-foot bulletin board into 4 sections with ribbon stretched from each corner to the oppsite corner. How much ribbon does she need?

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?