What is the value of 4x^3 + 4x when X=4?

Mathematics

1 answer:

IRISSAK [1]2 years ago

5 0

Step-by-step explanation:

$4 {x}^{3} + 4x \\ = 4 \times ( {4})^{3} + 4 \times 4 \\ = 4 \times 64 + 16 \\ = 256 + 16 \\ = 272$

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Working together, two identical water pumps can fill a pull in 10 hours. Determine whether quantities (number of pumps and hours

vovikov84 [41]

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The number of pumps and hours) vary inversely.

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Step-by-step explanation:

Let x be number of pumps and y be number of hours.

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As we increase number of pumps (x), number of hours (y) is decreasing and as we decrease x our y is increasing, therefore, number of pumps (x) and hours (y) vary inversely.

Since we know that an inversely proportion equation is in form: $y=\frac{k}{x}$ , where, k is constant of variation.