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ladessa [460]
3 years ago
15

amber wants to put tile on the back special for kitchen counter she will need 36 square feet of tile.she will use basic tile tha

t cost $8 per square foot and decorative tiles that cost $20 per square foot how many square feet of each tile should she use so that all overall cost of backsplash will be $10 per square foot?
Mathematics
1 answer:
Komok [63]3 years ago
5 0

Answer: Amber use 30 feet of basic tiles and 6 feet of decorative tiles.


Step-by-step explanation:

Let x be the foot  of basic tiles and y be the foot of decorative tiles.

Now, according to the question, we have the following equations

x+y=36\\y=36-x\ .......(1)\\\\8x+20y=36\times10\\2x+5y=90.......(2)\ \ \ [\text{divide equation by 4}]

Put y=36-x in (2), we get

2x+5(36-x)=90\\\Rightarrow2x+180-5x=90\\\Rightarrow-3x=-90\\\Rightarrow\ x=30\\\\\Rightarrow\ y=36-30=6

Hence, Amber use 30 feet of basic tiles and 6 feet of decorative tiles.

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