How many pounds of a 15% copper alloy must be mixed with 700lb of a 30% copper alloy to make a 25.5% copper alloy?

Mathematics

1 answer:

vitfil [10]3 years ago

7 0

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Which equation is equivalent to<br><br> f(x) = 16x4 – 81 = 0?

Vesna [10]

Answer:

The equivalent expression is:

$16x^4-81=(4x^2-9)(4x^2+9)$

Step-by-step explanation:

We have been given the equation:

$f(x)=16x^4-81=0$

Equivalent expression can be computed by solving the expression ai its maximum.

We can factorize the given equation:

By using $a^2-b^2=(a+b)(a-b)$

Here, $a=4x^2,b=9$

Hence, we get the equation below:

$16x^4-81=(4x^2-9)(4x^2+9)$

Therefore, the equivalent expression is:

$16x^4-81=(4x^2-9)(4x^2+9)$

5 0

3 years ago

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The graphs below show four functions: Graph A shows function f of x equals 4 multiplied by 3 to the power of x. Graph B shows fu

s2008m [1.1K]

Answer:

Graph B shows function f of x equals 4 multiplied by 3 to the power of negative x.

Step-by-step explanation:

$f(x) = 4(3)^{-x}$ is the value 4 times three raised to the negative x. Graph B is the best representation.

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3 years ago

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Help, Find the domain of the function

adell [148]

Answer:

(-∞,∞)

Step-by-step explanation:

This would form a roughly parabolic shape that extends infinitely along the x-axis. It would reach a height of ³√2 on the y-axis. Because it extends infinitely left and right, it would have an infinite domain. In interval notation, this would be (-∞,∞)

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3 years ago

Dollars per pint

lisabon 2012 [21]

Answer:

0.42 dollar per pint

2.36 pints per dollar