'which of the following is equivalent to the expression (x+3)(x-7)+(x+8)(x+3)? ' i use the distributive property and added etc. and my outcome was 2x^2+7x+3. i got the answer as (2x+1)(x+3) but only because it was an answer choice and was equivalent to 2x^2+7x+3. where did the 1 and 3 come from in (2x+1)(x+

Factor k2 - 17k + 16. a.(k - 2)(k - 8) b.(k - 1)(k + 16) c.(k - 1)(k - 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.

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document