Find the equation of the axis of symmetry of the following parabola using graphing technology.
y = x2 – 10x + 21
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Which is an equation for the nth terms of the sequence 12,15,18,21

Christine went shopping and bought each of her six six nephews a? gift, either a video costing? $14.95 or a cd costing? $16.88. she spent ? $ 97.42 97.42 on the gifts. how many videos and how many cds did she? buy?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.