Which statement is true? (1) A quadrilateral is always a parallelogram
(2) A square is always a parallelogram
(3) A parallelogram is never a rhombus
(4) A trapezoid never has two congruent sides

What percent of 18 is 24? and plz explain thx.

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

Hormones perform important functions within the reproductive system. during puberty, a number of changes occur in the body. which hormone is responsible for the development of these characteristics in the female? estrogen progestin progesterone testosterone