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insens350 [35]
3 years ago
10

If4 times the reciprocal of a number is 3 more than 5/2 times the reciprocal of that number find the number Show your work

Mathematics
2 answers:
Oliga [24]3 years ago
7 0
x-number\\x\neq 0\\ \\
4 \cdot \frac1x=3+\frac52 \cdot \frac1x\\
\frac4x=3+\frac5{2x}\ / \cdot 2x\\
8=6x+5\\
6x=8-5\\
6x=3\ /:6\\
x=\frac36=\frac12

anyanavicka [17]3 years ago
5 0

<em>1)</em>

<em>4·1/n = 3 + 5/2n</em>

<em>²⁾4/n = ²ⁿ⁾3 + 5/2n</em>

<em>8 = 6n + 5</em>

<em>6n = 8 - 5</em>

<em>6n = 3</em>

<em>n = 3⁽²/6</em>

<em>n = 1/2</em>

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Nimfa-mama [501]

The given expression is :

2xx+3-5(x-2)

We know that, x{\cdot}x=x^2

=2x^2+3-5(x-2)\\\\=2x^2+3+(-5)(x)+(-5)(-2)\\\\=2x^2+3-5x+10

Aleena expands 2xx+3-5(x-2) as 2x²+3-5x-10. She is mistaken because the sign before 10 should be +10 instead of -10. Hence, the correct expanded form is 2x²+3-5x+10. Hence, this is the required solution.

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3 years ago
Find the volume of a sphere with a surface area of 3600pi in squared.
Anna71 [15]

Answer:

36000pi

Step-by-step explanation:

V = 4/3*pi*r^3  so we need to know r

we know surface area, which is 4pi*r^2=3600pi.  so we can solve for r

r=30

so v = 4/3*pi*30^3 = 36000pi

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3 years ago
How do i show my work for 12.62 divide by 0.4
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Given that the diameter of Circle A is 6 cm , and the radius of Circle B is 18 cm , what can be concluded about the two circles?
ELEN [110]

Answer:

The radius of circle B is 6 times greater than the radius of circle A

The area of circle B is 36 times greater than the area of circle A

Step-by-step explanation:

we have

<em>Circle A</em>

D=6\ cm

The radius of circle A is

r=6/2=3\ cm -----> the radius is half the diameter

<em>Circle B</em>

r=18\ cm

Compare the radius of both circles

3\ cm< 18\ cm

18=6(3)

The radius of circle B is six times greater than the radius of circle A

Remember that , if two figures are similar, then the ratio of its areas is equal to the scale factor squared

All circles are similar

In this problem the scale factor is 6

so

6^{2}=36

therefore

The area of circle B is 36 times greater than the area of circle A

8 0
3 years ago
Find f (25/29) if f (x)=-5x+5
devlian [24]

Answer:

f(25/29) = \frac{20}{29}

Step-by-step explanation:

In order to do this problem, we need to plug in \frac{25}{29} for x. When we plug it in we get f(x) = -5(\frac{25}{29}) + 5. After this we can start by multiplying. When we multiply -5(\frac{25}{29} ) we get (\frac{-125}{29}) + 5. Since the fraction cannot be simplified any further, we can now add 5. In order to add 5 we need to find a common denominator, which in this case will be 29. Changing the denominator to 29 gives us (\frac{-125}{29}) + \frac{145}{29} because when changing the denominator we have to multiply the numerator by the same number. After adding these fractions we get our answer of \frac{20}{29}.

5 0
3 years ago
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