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3 years ago

5

It cost $15 dollars to send 3 packages though a certain shipping company. Consider the number of packages per dollar. find the c

onstant of proportionality
At the same rate how much will it be for 6 packages to be shipped

1 answer:

horrorfan [7]3 years ago

5 0

The constant of proportionality is y=5x. It will cost $30 for 6 packages to be shipped.

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Step-by-step explanation:

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Sati [7]

Answer:

$d = \frac{4 - 3c}{c + 1}$

Step-by-step explanation:

To make d the subject of formula, we need to rearrange the equation such that we arrive at d= _____.

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<em>Remove the fraction by multiplying (d +3) on both sides:</em>

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<em>Expand</em><em>:</em>

<em> $cd + 3c = 4 - d$ </em>

<em>Bring</em><em> </em><em>all</em><em> </em><em>the</em><em> </em><em>d</em><em> </em><em>terms</em><em> </em><em>to</em><em> </em><em>one</em><em> </em><em>side</em><em> </em><em>and</em><em> </em><em>move</em><em> </em><em>the</em><em> </em><em>others</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>other</em><em> </em><em>side</em><em> </em><em>of</em><em> </em><em>the</em><em> </em><em>equation</em><em>:</em>

$cd + d = 4 - 3c$

<em>Factorise</em><em> </em><em>d</em><em> </em><em>out</em><em>:</em>

<em> $d(c + 1) = 4 - 3c$ </em>

<em>Divide</em><em> </em><em>by</em><em> </em><em>(</em><em>c</em><em> </em><em>+</em><em>1</em><em>)</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>:</em>

<em> $d = \frac{4 - 3c}{c + 1}$ </em>

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3 years ago