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Alex17521 [72]
3 years ago
7

7a = 28 Is a=21 a solution? yes or no

Mathematics
2 answers:
bagirrra123 [75]3 years ago
4 0
No, because 7 x 21 is 147.
vovangra [49]3 years ago
3 0

Answer:

No

Step-by-step explanation:

No because if a = 21, then 7 * 21 = 147 and 147 is not 28.

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Select the correct answer.<br> Rewrite the following expression.
kolezko [41]

The <em>algebraic</em> expression x^{10/3} is equivalent to the <em>algebraic</em> expression x^{3}\cdot \sqrt[3]{x}. Thus, the right choice is option D.

<h3>How to apply power and root properties to rewrite a given expression</h3>

In this question we must apply the following set of <em>algebraic</em> properties to simplify a given expression:

x^{m/n} = \sqrt[n]{x^{m}} = \left(\sqrt[n]{x}\right)^{m}   (1)

x^{m+n} = x^{m}\cdot x^{n}   (2)

x^{m\cdot n} = \left(x^{m}\right)^{n} = \left(x^{n}\right)^{m}   (3)

Where:

  • <em>m</em>, <em>n</em> - Exponents
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And also by apply the definition of power.

If we know that the given expression is x^{10/3}, then the equivalent expression is:

x^{10/3} = \sqrt[3]{x^{10}} = \sqrt[3]{x^{9}\cdot x} = \sqrt[3]{x^{9}}\cdot \sqrt[3]{x} = x^{3}\cdot \sqrt[3]{x}

The <em>algebraic</em> expression x^{10/3} is equivalent to the <em>algebraic</em> expression x^{3}\cdot \sqrt[3]{x}. Thus, the right choice is option D.

To learn more on roots, we kindly invite to check this verified question: brainly.com/question/1527773

7 0
2 years ago
A real estate company owns 120 apartments which are fully occupied when the rent is $800 per month. Analytics indicate that for
UNO [17]

9514 1404 393

Answer:

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Step-by-step explanation:

If r is the rent charged, then the number of $40 increments of increase will be ...

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and the number of occupied apartments will be ...

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The gross income (g) will be the number of apartments times the rent charged, or ...

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The equation describes a parabola with zeros at r=0 and r=1760. The vertex will be on the line of symmetry, halfway between those zeros. The maximum gross income will be had when the rent is 1760/2 = 880.

$880 should be charged for rent to maximize gross income.

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3 years ago
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IgorLugansk [536]
7.7 cm. Hope this helps!
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The answer is 3/2


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I will give brainiest to who ever can copy and answer this math problem first : 12342345791 + 3214567349=
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Answer:

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