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2 years ago

If y = kx, what is the value of k if y = 20 and x = 0.4? A)5 B)8 C)9.6 D)50

Mathematics

2 answers:

lara31 [8.8K]2 years ago

7 0

Given expression :

y = kx

let's plug the value of x as 0.4 and y as 20 in the given equation :

20 = 0.4k

k = 20 ÷ 0.4

k = 50

correct choice - D. 50

JulsSmile [24]2 years ago

5 0

$\\ \sf\longmapsto y=kx$

$\\ \sf\longmapsto k=\dfrac{y}{x}$

put values

$\\ \sf\longmapsto k=\dfrac{20}{0.4}$

$\\ \sf\longmapsto k=50$

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Answer:

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2 years ago

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e-lub [12.9K]

Answer:

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Step-by-step explanation:

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3 years ago

Integrate this two questions

tankabanditka [31]

Simplify the integrands by polynomial division.

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$\dfrac t{1 + 4t} = \dfrac14 \left(1 - \dfrac1{1 + 4t}\right)$

Now computing the integrals is trivial.

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where we use the power rule,

$\displaystyle \int x^n \, dx = \frac{x^{n+1}}{n+1} + C ~~~~ (n\neq-1)$

and a substitution to integrate the last term,

$\displaystyle \int \frac{dt}{1-3t} = -\frac13 \int \frac{du}u \\\\ = -\frac13 \ln|u| + C \\\\ = -\frac13 \ln|1-3t| + C ~~~ (u=1-3t \text{ and } du = -3\,dt)$

$\displaystyle \int \frac t{1+4t} \, dt = \frac14 \int \left(1 - \frac1{1+4t}\right) \, dt \\\\ = \frac14 \left(t - \frac14 \ln|1 + 4t|\right) + C \\\\ = \boxed{\frac t4 - \frac{\ln|1+4t|}{16} + C}$

using the same approach as above.

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1 year ago

HELP ASAP PLEASE!

Genrish500 [490]

Step-by-step explanation:

lets take a look....

In order to find the perimeter of a triangle you have to get the sum of all sides. In other words,

Blue triangle:

$p = (4x +2) + (7x + 7) + (5x - 4) \\ p = 4x + 2 + 7x + 7 + 5x - 4 \\ p = 16x + 5$

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$p = (x + 3) + (2x - 5) + (x + 7) \\ p = x + 3 + 2x - 5 + x + 7 \\ p = 4x + 5$

Difference:

$d = (16x + 5) - (4x + 5) \\ d = 16x + 5 - 4x - 5 = 12x \\ d = 12x$

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2 years ago

The measures of an angle and its supplement differ by 40°. What are the measures of the angles? Hint: An angle and its supplemen

bogdanovich [222]

Let the two numbers be x and x + 40, then
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