When solving a multi-step quadratic equation using the square root method, when should the square root of both sides of the equation be taken?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true