Answer:
4 packs of invitations and 2 packs of napkins.
Step-by-step explanation:
let h= history books
science books = s
h=2s there are 2 times as many history as science so to get them equal we double the science
h+s=81 there are 81 total history and science books
2s+s=81 substitute 2s for h in the above equation
3s = 81 combine like terms
s = 27
There are 27 science books
h=2s
h=2(27)
h=54
there are 54 history books
(5)(6)(8) = 240
240 blocks in one box.
(240)(3) = 720
720 blocks in three boxes
Answer:
28,000
Step-by-step explanation:
multiply 7 cars with 4,000
