More free points i guess

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

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

The sum of a number and 5 times the number is 18.find the number