Horatio has 57 coins consisting of nickels, dimes, and quarters. he has twice as many dimes as
nickels. if the coins are worth a total of $7.25, which system of equations is used to determine
how many of each coin horatio has?
in + d + 9 = 57
n = 20
5n + 10d + 259 = 7.25
n + d + 9 = 57
n = 2d
0.05n + 0.100 + 0.259 = 7.25
nt d + 9 = 57
d = 2n
5n + 10d + 259 = 7.25
nd + 9 = 57
d = 2n
0.05n + 0.10d + 0.259 = 7.25

What is this equation in point-slope form?

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?