The north shore news charges $19.50 for a two- line automotive ad. each additional line costs $7. how much does a six line ad cost?

Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters