HELP i need an answer now

dont forget to explain

What number should be added to both sides of the equation to complete this square? x^2-10x=7

What are the related frequencies to the nearest hundredth of the columns of the two way table? group 1: a-102 b-34group 2: a-18 b-14edited: i don’t have all day to be waiting for an answer. i figured it out.

Evaluate the expression for the given value of the variable 7a - 4a for a =8