What is the greatest common factor of 65,143,and 169

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500