Given 16 = - 5 + z4 solve for z a. 59 b.-1 c. 9 d. 69

In the question 16 = - 5 + z∧4, z is the only unknown value. It can be solve as follows,

16 = - 5 + z ∧4

z∧4 = 16+5

z∧4 = 21

Find the 4th root on both side of the equation,

z = the 4th root of 21

= 2.140695143

To the nearest tenth, z = 2.1