To find this answer, we need to multiply 3.57 by 12.

Therefore, 12 planks will cost $42.84.
The answer is 8 hope this helps all u have to do is figure out what two numbers added togher give you 18
If c = the cost of one table, the cost of all 25 tables before sales tax is 25·c
Since the sales tax is 5%, or 0.05, the sales tax for 25 tables is 25·c·0.05
Adding the sales tax to the original cost of the 25 tables can give you:
25·c + 25·c·0.05 = 1706.25
1.05·25·c = 1706.25
26.25·c = 1706.25
c =

= 65
so the refund for 5 tables would be 5*65 = $325
Answer:
13.41
Step-by-step explanation:
Hope it helps!