Which of the following expressions are equivalent? Why? If an expression has no match, write two equivalent expressions to match it.
a. 2(x + 4)
b. 8 + 2x
c. 2x + 4
d. 3(x + 4) - (4 + x)
e. x + 4

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