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4 years ago

Plz help me schools in 2 more days

Mathematics

1 answer:

Lapatulllka [165]4 years ago

6 0

So, to begin, we can set the scenario into an equation to solve for the amount of magnets that Sarah had...

Joseph had 28 magnets, plus an unknown amount, x :

28 + x

Sarah had 157, plus the same unknown amount.

157 + x

Also, Sarah had four times the amount of Joseph at the end:

4(28 + x)

As a full equation:

$157 + x = 4(28 + x)$

Now, all we have to do is solve for x, the unknown amount:

$157 + x = 4(28 + x)$

Use the Distributive Property on 4(28 + x):

$157 + x = 112 + 4x$

Subtract x on both sides:

$157 + x - x = 112 + 4x - x$

$157 = 112 + 3x$

Subtract 112 on both sides:

$157 - 112 = 112 - 112 + 3x$

$45 = 3x$

Divide by 3 on both sides:

$15 = x$

15 is the unknown amount added to each pile of magnets!

Hope I could help you out!

Have a good one, and God bless!

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Haz la sustitución:

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Para confirmar el resultado:

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Sustituye:

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(Te dejaré confirmar por ti mismo.)

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Sustituye:

$y=1-x^2\implies\mathrm dy=-2x\,\mathrm dx$

$\implies I=\displaystyle-\frac12\int\frac{\mathrm dy}{\sqrt y}=-\frac12(2\sqrt y)+C=-\sqrt{1-x^2}+C$

$I=\displaystyle\int\left(1+\frac1t\right)^3\frac{\mathrm dt}{t^2}$

Sustituye:

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Podemos hacer que esto se vea un poco mejor:

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4 years ago

Suppose that land in downtown Savannah is valued at $20 per square foot. What is

saveliy_v [14]

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To find the price just need to take 8277.7 time 20 = 165554

So the answer is $165554

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2 years ago

it cost $3.45 to buy 3/4 lb of chopped walnuts how much would it cost to purchase 7.2 lb of walnuts

andreev551 [17]

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3 years ago

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3 years ago

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sertanlavr [38]

Answer:

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