2. how many more possible arrangements can be made using the letters of the word permutations than using the letters of the word combinations? justify your answer.

PERMUTATIONS -

COMBINATIONS -

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or  

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.