Answer:
Yadira's mom should buy 36 hot dogs and 36 buns.
Step-by-step explanation:
Hot dogs come in packs of 12.
Hot dog buns come in packs of 9.
Yadira's mom wants the same number of hot dogs as hot dog buns.
So, to get the smallest total number of hot dogs we will find the least common multiple to 12 and 9.
12 = 2 x 2 x 3
9 = 3 x 3
So, LCM is = 2 x 2 x 3 x 3 = 36
Hence, Yadira's mom should buy 36 hot dogs (36/12=3 packs) and 36 buns (36/9=4 packs).