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3 years ago

-2/3x+3/7=1/2 solve for x

1 answer:

6 0

-2/3x+3/7=1/2
-2/3x=13/14. Multiply by -2 to get positive
(-2). (-2) and whole number for x
3x=-26/14 or -13/7 [ -13/7_ 3 = -13/7 *1/3 =
Divide by 3 13/21

x=13/21

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sveta [45]

Answer:

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Step-by-step explanation:

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3 years ago

The total weight of a rock depends on its size and is proportional to its density. In this context, density is the weight per cu

kow [346]

Answer:

$d = \frac{w}{48}$

If $\frac{1}{48} \\$ is constant, say k

Then,

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Hence, weight is proportional to the density

Step-by-step explanation:

From the question,

Let w denote the weight of the rock in pounds

s denote the size of the rock in cubic inches and

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First, we will write the equation connecting w, s, and d.

We get

$density (pounds/inch^{3} ) = \frac{weight(pounds)}{size (inch^{3}) }$

That is,

$d = \frac{w}{s}$

Now, given a 48-cubic-inch rock with weight w pounds, to show the proportional relation between the weight and the density, we will write

$d = \frac{w}{48}$

If $\frac{1}{48} \\$ is constant, say k

Then,

$d = kw$

∴ d ∝ w

Hence, density is proportional to the weight OR weight is proportional to the density

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3 years ago

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4 years ago

Read 2 more answers

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3 years ago