State whether each situation involves a permutation or a combination.
a. choosing a class president, vice president, and secretary.
b. four tennis players from a group of nine.
c. eight toppings for ice cream

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

Alina fully simplifies this polynomial and then writes it in standard form. xy2 – 2x2y + 3y3 – 6x2y + 4xy2 if alina wrote the last term as 3y3, which must be the first term of her polynomial in standard form? xy2 5xy2 –8x2y –2x2y

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking/show your work: