What is the sum of sqrt-2 and sqrt -18?

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at __ link to graph: .

If a || b and e || f , what if the value of y ?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?