Find the perimeter of the shaded region

What is the inverse of the function f(x) = 2x + 1?

Which best explains why this triangle is or is not a right triangle ?

The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x. what is the rate of increase or decrease associated with this account? 20% decrease 20% increase 25% decrease 25% increase