When z = ___. 03/25/2021 – by Mod_GuideK 0 FILL BLANK If , then a = 3 when z = ___. SHOW ANSWERSCorrect Answer: 27 Explanation/Reference: Explanation: Substitute 3 for a: , To solve for z, raise both sides of the equation to the power 2/3: Download Printable PDF. VALID exam to help you PASS.