Z+x3:use x = 1 and z = 19

What is the value of x in the following equation. -x ^3/2 = -27

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax