Which expression shows the amount would you pay if your lunch bill is X and you leave(pay) a 15% tip? a) x - 0.15x
b) x + 0.15x
c) 1.15x - x
d) 2.15x

Evaluate the following expression 1/3^2

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

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.