Jing spent ⅓ of her money on a pack of pens, ½ of her money on a pack of markers, and ⅛ of her money on a pack of pencils. What fraction of her money is left? *Jing spent ⅓ of her money on a pack of pens, ½ of her money on a pack of markers, and ⅛ of her money on a pack of pencils. What fraction of her money is left? *

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

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