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
Answer:200
Step-by-step explanation:
2000x0.1=200
200
Answer:
7.4
Step-by-step explanation:
- find the area of rectangular sign8times6.5)=52,take if 1l=14m^2 what about 52 then multiply by 2
It depends on what happens to the price of the item during the sale which is not stated in your problem. So if it cost 6 dollars and goes on sale it should be 6 dollars.
