The circle given by x² + y^2 - 2y- 11 = 0 can be written in standard form like this: x^2(y – k)^2= 12
What is the value of k in this equation?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

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