How do I simplify a radical like this
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Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work

Which of the following is true about the following construction of a tangent to a circle from a point outside of the circle?