The correct awnser is 54 i hope i help you
If 9kg costs 12$, then a single kg costs around 1.3$
This is done with a simple proportion
9 : 12 = 1 : X
x = 12/9
x = 1.33
You reduce by since they are even number you divide each by 2, 2:40, if you can still divide then do so, it simplifies to 1:20
I think it's 25. area is length times width aka...5 X 5 if you take the length times width of the tiles it's 1.
1x = 25 divide both sides by 1...
x ( number of tiles) = 25
There are around 8 booklets in the lab because 6÷2 is 3 and 25÷3=8.3333333333333333333
