The price of a notebook has dropped to

$3.10

today. yesterday's price was
$3.35
. find the percentage decrease. round your answer to the nearest tenth of a percent.

Twelve less than a number is at most 20

3x + 4y = 5 x- 3y = -7 solve by substitution

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?