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A mixture of 650 nails costs $43.50. If some of the nails cost 5 cents a piece, and therest costs 7 cents a piece, how many of each are there?
So the total number of nails is 650, therefore:
- X + Y = 650, and 5X + 7Y = 4350
First we can solve the first equation for Y:
- Y = 650-X
Now that we know the relationship between X and Y, we can solve for one of them by substituting that value into the other equation. :
- 5X + 7Y = 4350
- 5X + 7(650-X) = 4350
- 5X + 4550 - 7X = 4350
- -2X + 4550 = 4350
- -2X=-200
- X=100
Since Y = 650-X, Y = 550.
If we plug those numbers into our original equations then we can verify the solution:
7(550) + 5(100) = 4350.
(550) + (100) = 650
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If a customer buys 24kg of nails at 16 cents per kg how much is the total purchase?
24 x 16 = 384
How can you use physical properties to separate a mixture of ice cubes and nails?
The shape, the density, the molecular structure, etc. Physical is just the appearance and what it is made up of, so it's easy.
Why should be done from the corners to the center of the nails?
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How many nails in a pound?
That would depend on the type (common, roofing, concrete) and their size as measured like a two penny (2d) nail and so on. For example 60d common nails are 10 to the pound and 2d roofing nails are 225 to the pound.
How can you stop a monster from biting his nails?
Other answers:Joke: How can you stop a monster from biting his nails?Punchline: Buy him a bag of screws.Joke: How can you stop a monster from biting his nails?Punchline: Send him to a Monster Reform School.
50mm nails costs 6 pound 50 pence per kilo and longer 75mm nails cost 5 pound 40 pence per kilo suggest why the longer nails have a lower cost?
manufacturing costs, you don't need to make as many 75mm nails per kilo
Do they sell glue for nails in the 98 cents store?
no they dont you wally hahahaha
What are the different types of nail enhancements?
The different types of nail enhancements include acrylic nails, gel nails, dip powder nails, and silk or fiberglass wraps. Acrylic nails are made from a liquid and powder mixture, gel nails are cured under UV light, dip powder nails involve dipping the nails into a powder and adhesive mixture, and silk or fiberglass wraps are used to strengthen natural nails.
How much are acrylic nails?
Acrylic nails have an initial cost of between $25 and $80. The nails have to be maintained as early as every 7 days. Maintenance costs are from $15 to $50 per week.
How can you use a candle to separate nails from gravel?
You can heat the mixture of nails and gravel up with the candle flame. The nails will expand faster than the gravel due to their higher thermal conductivity, making it easier to separate them by picking out the expanded nails.
How do you separate sawdust from nails?
One way to separate sawdust from nails is by using a magnet to attract and remove the nails while leaving the sawdust behind. Another method is to use a sieve or strainer to filter out the nails from the sawdust by pouring the mixture through it. Alternatively, you can spread the mixture out and physically pick out the nails from the sawdust.
Is nail polish remover a colloid mechanical mixture a suspension or a solution?
Nail polish remover is a solution. It consists of a solvent (usually acetone or ethyl acetate) that dissolves the nail polish to help remove it from nails.
How do you separate iron nails and salt?
One way to separate iron nails and salt is by using a magnet. Since iron is magnetic, you can move a magnet over the mixture and the iron nails will be attracted to the magnet, allowing you to separate them from the salt. Another method is to dissolve the mixture in water, as salt dissolves readily, and then use filtration to separate the solid iron nails from the dissolved salt solution.
Is nail polish a suspension?
its a chemical mixture that you put on your finger and toe nails to make them shiny.
What is the cost in dollars for the nails used to build a fence 125 meters long if it requires 30 nails per meter?
That's a total of 3750 nails - but - the total cost would depend on how much a single nail costs !
What could be used to separate nails from saw dust?
A magnet can be used to separate nails from sawdust easily as nails are ferromagnetic and will be attracted to the magnet, while sawdust will not be affected. Alternatively, using a sieve with small enough holes can also help separate the nails from the sawdust by sifting the mixture.
What processes separates a mixture according to the chemical properties rather than the physical properties of the components of the mixture?
Burning old wooden boards to recover the nails and screws embedded in them.
