Let u = <-9, 4>, v = <8, -5>. Find u - v

< -17,  9>

Step-by-step explanation:

u = < -9, 4>

v = <8, -5>

u - v = < -9  - 8,  4 - (-5) >  =  < -17,  9>

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.