find the equation of the line that contains the given point and is perpendicular to the given line below

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

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

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?