What are the center and radius of the circle defined by the equation
y2-6x+4y+4=0?

Can (2,3 and square root 10) be sides ona right triangle?

Solve 2x+y=3 x+y=5 in substitution method

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics