If the slope of a line is -7 what would the slope of a line perpendicular to it be.?

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. solve this quadratic equation using the quadratic formula. 2x2 - 2x=1 need asap

I’m really confused and need to learn this

Acircle has a radius of 12.6cm what is the exact length of an arc formed by a central angle measuring 120