8to the power of negative 2 × a to the power of 7

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Which of the following is closest to 32.9 x 7.5? a: 232 b: 259 c: 220 d: 265

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