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vfiekz [6]
3 years ago
13

Someone please help...​

Mathematics
1 answer:
Viefleur [7K]3 years ago
3 0

Answer:

2 1/3

1 4/3

2.333...

233.3...%

Step-by-step explanation:

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The number obtained on rationalizing the denominator of 1/(√7--2) is
Slav-nsk [51]

\frac{1}{ \sqrt{7}  -(- 2)}  \\ rationalizing \:  \:  \: the \:  \:  \: denominator \:  \:  \: we \:  \:  \: have \\  =  \frac{1}{ \sqrt{7} + 2 }  \times  \frac{ \sqrt{7}  - 2}{ \sqrt{7}  - 2}  \\  =  \frac{ \sqrt{7}  - 2}{ {( \sqrt{7} )}^{2} -  {(2)}^{2}  }  \\  =  \frac{ \sqrt{7} - 2 }{7 - 4}  \\  =  \frac{ \sqrt{7}   - 2}{3}

Hope you could get an idea from here.

Doubt clarification - use comment section.

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2 years ago
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The square rootof which number is rational a7. b 1.96. c. 0.04. d. 13​
artcher [175]

Answer:

B and C

Step-by-step explanation:

We need to find which one of these numbers is a perfect square. We know 7 and 13 can be eliminated since they're prime numbers so they can't be perfect squares. B and C are both perfect squares so that's the answer.

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3 years ago
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On a cruise of 1125 passengers. 450 were female what fraction of passengers were male?
WINSTONCH [101]

Step-by-step explanation:

\\1125-450=675

\frac{675}{1125}=\frac{3}{5}

4 0
3 years ago
27x+5+15x-2 what is the degree angle
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The original motivation for choosing the degree as a unit of rotations and angles is unknown. One theory states that it is related to the fact that 360 is approximately the number of days in a year.[5] Ancient astronomers noticed that the sun, which follows through the ecliptic path over the course of the year, seems to advance in its path by approximately one degree each day
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Write the equation of the sphere in standard form. x^2 + y^2 + z^2 + 2x − 4y − 6z = 22
madam [21]

The equation x^{2} +y^{2} +z^{2} +2x-4y-6z=22  in standard form looks like (x+1)^{2} +(y-2)^{2} +(z-3)^{2} =(6)^{2}.

Given equation of sphere be x^{2} +y^{2} +z^{2} +2x-4y-6z=22.

We are required to express the given equation in the standard form of the equation of sphere.

Equation is basically relationship between two or more variables that are expressed in equal to form. Equation of two variables look like ax+by=c. It may be linear equation,quadratic equation, cubic equation or many more depending on the powers of variables. The standard form of the equation of sphere looks like  x^{2} +y^{2} +z^{2} =r^{2}.

The given equation is x^{2} +y^{2} +z^{2} +2x-4y-6z=22.

We have to break 22 which is in right side into various parts according to the left side of the equation.

x^{2} +y^{2} +z^{2} +2x-4y-6z=-1-4-9+36

x^{2} +y^{2} +z^{2} +2x-4y-6z+1+4+9=36

x^{2} +1+2x+y^{2}+4-4y+z^{2} +9-6z=36

x^{2} +(1)^{2} +2*1*x+y^{2} +(2)^{2} -2*2y+z^{2} +(3)^{2} -2*3z=36

(x+1)^{2} +(y-2)^{2} +(z-3)^{2} =(6)^{2}

Hence the equation x^{2} +y^{2} +z^{2} +2x-4y-6z=22  in standard form looks like (x+1)^{2} +(y-2)^{2} +(z-3)^{2} =(6)^{2}.

Learn more about equations at brainly.com/question/2972832

#SPJ4

7 0
1 year ago
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