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3 years ago

Hello please help i’ll give brainliest

Mathematics

1 answer:

Leno4ka [110]3 years ago

5 0

pangaea

the world was a giant landmass millions of years ago that was called pangaea

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What is the square root of 74

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8.602325

Simplified: 8.6

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3 years ago

What three points are solutions to 2x-y =4

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Attached file

Step-by-step explanation:

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2 years ago

It is given that y varies inversely as x^2. If x is decreased by 50%, find the percentage change in y.

vova2212 [387]

Answer:

300%

Step-by-step explanation:

Given

$y\ \alpha\ \frac{1}{x^2}$

Required

Find the percentage change in y when x decreased by 50%

First, convert to equation

$y\ = \ \frac{k}{x^2}$

Where k is the constant of proportionality

When x decreased by 50%

$Y = \frac{k}{(x - 0.5x)^2}$

$Y = \frac{k}{(0.5x)^2}$

$Y = \frac{k}{0.25x^2}$

Expand

$Y = \frac{1}{0.25} * \frac{k}{x^2}$

Substitute $\frac{k}{x^2}$ for y

$Y = \frac{1}{0.25} * y$

$Y = 4 * y$

$Y = 4 y$

The percentage change is then calculated as:

$\%Change = \frac{Y - y}{y} * 100\%$

$\%Change = \frac{4y - y}{y} * 100\%$

$\%Change = \frac{3y}{y} * 100\%$

$\%Change = 3 * 100\%$

$\%Change = 300\%$

<em>The percentage in y is 300%</em>

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3 years ago

How can u tell from a graph that the graph represents a proportional relationship?

Ulleksa [173]

It is a straight line of positive gradient that passes through the origin

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3 years ago

It takes a computer 1.2 seconds to perform an operation. If a task contains eight operations how many seconds will it take for c

serg [7]

Answer:

19.2 seconds

Step-by-step explanation:

1.2 times 8 which equals 9.6

9.6 times 2

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3 years ago

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