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Leona [35]
3 years ago
15

How many pounds of nails costing $7 per pound must be mixed with 6 pounds of nails costing $3 per pound to yield a mixture costi

ng $4 per pound?
Mathematics
1 answer:
Yuliya22 [10]3 years ago
6 0
Let nails 7/pound=N1
nails 3/pound=N2

let N1=x
N2=6
then total=x+6
7x+6*3=(x+6)*4
7x+18=4x+24
3x=6
x=2
so 2 pounds on Nails costing 7/pound must be added
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julsineya [31]
The answer is $37,923

<span>y = 844.697x^2 + 3723.485x - 13,650
x - number of years
y - the annual profit

If x = 8, the annual profit y is:
y = </span>844.697 * 8^2 + 3723.485 * 8 - 13,650
y = 844.697 * 64 + 29,787.88 - 13,650
y = 54,060.608 + 16,137.88
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3 years ago
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Answer:

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Step-by-step explanation:

The standard form of an equation of a line:

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y=-\dfrac{1}{2}x+4

Convert:

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Thirty-two percent of all Americans drink bottled water more than once a week (Natural resources Defense Council, December 4, 20
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Step-by-step explanation:

6 0
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tester [92]

Answer:

see explanation

Step-by-step explanation:

Given AB ≅ BC, then

AB = BC = x + 6 , and

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x - 31 = 12 ( add 31 to both sides )

x = 43

Hence

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3 years ago
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MAXImum [283]

Answer:

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Step-by-step explanation:

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