2. Martha bought a total of 12 items from the book store. Each item was either a pack of pencils of $1.25 or a spiral notebook for $3.50. She spent a total of $37.50. How many packs of pencils did she buy?​

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)