CBSE > Class 09 > Mathematics | CBSE Board | Homework Help

AOB is a straight line
{tex}\therefore{/tex} {tex}\angle{/tex}AOC + {tex}\angle{/tex}COD + {tex}\angle{/tex}DOB = 180°
{tex}\Rightarrow{/tex} (3x – 5)° + 55° + (x + 20)° = 180°
{tex}\Rightarrow{/tex} 3x – 5° + 55° + x + 20° = 180°
{tex}\Rightarrow{/tex} 4x + 70° = 180°
{tex}\Rightarrow{/tex} 4x = 180° – 70°
{tex}\Rightarrow{/tex} 4x = 110°
{tex}\Rightarrow{/tex} x =110/4 = 27 ½°
Therefore, {tex}\angle{/tex}AOC = 3x – 5° = 3 {tex}\times{/tex} 27½° – 5 = 77½°
and {tex}\angle{/tex}BOD = x + 20 = 27 ½ + 20 = 47 ½^o

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Factorise x4+x2y2+y4

Posted by Rohan Rawat 6 years, 5 months ago

CBSE > Class 09 > Mathematics

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Prove that an equilateral triangle can be constructed on any given line segment.

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CBSE > Class 09 > Mathematics

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CBSE > Class 09 > Mathematics

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write in form of 0.5 , 0.555 , 2.343 , 0.123 , 0.00352 , 15.712 with full solution

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CBSE > Class 09 > Mathematics

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CBSE > Class 09 > Mathematics

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CBSE > Class 09 > Mathematics

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What is zero of polynomial x^2- x

Posted by Kaycee Choudhary 6 years, 5 months ago

CBSE > Class 09 > Mathematics

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Icse Help 6 years, 5 months ago

^{x^2-x = 0}

^{x(x-1) = 0}

^{either x = 0, or x -1 = 0}

^{so x = 0 or x = 1}

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How to factorise terms with a example

Posted by Akansha Rai ?? 6 years, 5 months ago

CBSE > Class 09 > Mathematics

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Pratik Verma 6 years, 5 months ago

You should study from your book

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How to factorise 6 terms

Posted by Akansha Rai ?? 6 years, 5 months ago

CBSE > Class 09 > Mathematics

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Pratik Verma 6 years, 5 months ago

Give your number then i can help u

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Pratik Verma 6 years, 5 months ago

How can i tell u

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Prove that the angle in a semicircle is a right angle

Posted by Akram Khan 6 years, 5 months ago

CBSE > Class 09 > Mathematics

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Kamal Singh 6 years, 5 months ago

90 degree

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If three numbers are related in such a way that the first is less (greater) than the second is less (greater) than the third, then the first is less (greater) than the third. What is the name of this property?

Posted by Suvra Sar 6 years, 5 months ago

CBSE > Class 09 > Mathematics

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Find the coordinates of the point whose lines ax=by and ay=ax intersect

Posted by Parneet Kaur 6 years, 5 months ago

CBSE > Class 09 > Mathematics

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Posted by Twinkle Pal 6 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Kamal Singh 6 years, 5 months ago

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Deference between rational and irrational number

Posted by Aditya Ojha 6 years, 5 months ago

CBSE > Class 09 > Mathematics

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Abhijeet Singh 6 years, 5 months ago

Rational are the numbers which can be written in the p/q form. Irrational no. Are the numbers which can not be written in the p/q form

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Sia ? 6 years, 5 months ago

Numbers such as 3/8 and -4/9 are also rational because their numerators and denominators are both whole numbers. Alternatively, an irrational number is any number that is not rational. It is a number that cannot be written as a ratio of two integers (or cannot be expressed as a fraction).

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1/√7=?

Posted by Twinkle Pal 6 years, 5 months ago

CBSE > Class 09 > Mathematics