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4 years ago

A knife is three times the cost of a spoon. 9 spoons and 12 knifes cost ?82.80 workout the cost of 1 knife.

Mathematics

2 answers:

Talja [164]4 years ago

8 0

Answer:

1.84 x 3 = $5.52

tankabanditka [31]4 years ago

7 0

Let S = spoon

Let K = knife

1 knife is thee times the cost of a spoon, so it would be 3S

Now you have 9S + 12K = 82.80

We can replace the K with 3S:

9S +12(3S) = 82.80

Simplify the left side:

9S + 36S = 82.80

Add:

45S = 82.80

Divide both sides by 45"

S = 82.80 / 45

S = 1.84

One spoon cost $1.84

We know one knife cost 3 times as much, so multiply the cost of a spoon by 3:

Knife = 1.84 x 3 = $5.52

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katen-ka-za [31]

Let the fruit mixture of $5.7 per pound be for x pounds.

The nut of $14.55 per pound would then be: (10 -x).

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4 years ago

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nikitadnepr [17]

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3 years ago

Solve Quantity x plus 6 end quantity over 2x is equal to three-fourths. Show all work.

Jet001 [13]

The expression described is translated into the following formula:

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Expand both sides:

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Check:

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Which is true because

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3 years ago

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nadezda [96]

I hope that this help 64+24=88

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3 years ago

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Step-by-step explanation:

11) A

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