Pl help

what is this?:raise the sum of z and 4 to the 5th power

If x+y+z=0 what is the value of [tex] {x}^{3} + {y}^{3} + {z}^{3} [/tex]

(10. in the figure, a aabc is drawn tocircumscribe a circle of radius 3 cm ,such thatthe segments bd and dc are respectively oflength 6 cm and 9 cm. find the length ofsides ab and ac.

Complete the conditional statement. if a + 2 < b + 3, then a < b b < a a – b < 1 a < b + 1