If z=3+i/3-i find the value of 1/z and z+1/z

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

Apiling for a high-rise building is pushed by two bulldozers at exactly the same time. one bulldozer exerts a force of 1250 pounds in a westerly direction. the other bulldozer pushes the piling with a force of 2650 pounds in a northerly direction. what is the direction of the resulting force upon the piling, to the nearest degree? a. 65 n of w b. 25 n of w c. 45 n of w d. 35 n of w

Plz hurry evaluate the expression a+b where a=8 and b=19