18 . it's increasing by 5 every time so the next one after 23 is 28
We cannot determine the cost of the tiles from the given information, so the question cannot be answered.
and
both have a common denominator, so you can combine them into a single fraction:

You cannot simplify this fraction further:
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Answer:

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G=0 would be your answer as it is greater than the number
Answer:
1/2
Step-by-step explanation:
1/4 (4x - 8) + 3x =0
distribute the 1/4
x-2+3x=0
combine like terms
-2+4x=0
move -2 to the other side [by ADDing +2 to each side
4x=2
divide [by 4 on both sides]
x=1/2