The slope of y=2x+1 is: 2. The parallel line needs to have the same slope of 2. We can solve it using the point-slope equation of a line: y â y1 = 2(x â x1) And then put in the point (5,4): y â 4 = 2(x â 5) And that answer is OK, but let's also put it in y = mx + b form: y â 4 = 2x â 10.
1 In-office teeth whitening treatments by a dentist can cost $300-$1,000 or more, but average about $500-$700.
1 Cosmetic work is typically not covered by dental insurance. 2  Teeth whitening can cost $50-$200 per treatment in a spa, salon or mall kiosk; $100-$500 for dentist-supervised at-home bleaching trays; and $300-$1,000 or more for in-office treatments. Filling a cavity can cost $50-$300 or more for a silver amalgam filling, and $90-$450 or more for a tooth-colored composite; insurance typically covers all or most of the cost of amalgam fillings, but only part of the composite filling cost.