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

Ask questions which are clear, concise and easy to understand.

Ask Question

Prove that 3root3 is an irrational number

Posted by Shaima Bi 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

The area of triangle with Base 4cm and height 6cm is 24cm

Posted by Mj Khan 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

The area of triangle with base 4cm and height 6cm is 24cm

Posted by Mj Khan 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

The area of triangle with base 4cm and height 6cm is 24cm

Posted by Mj Khan 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

The area of triangle with base 4cm and height 6cm is 24cm^2

Posted by Mj Khan 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Concept of polynomial

Posted by Aman Tripathi 5 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 10 months ago

Polynomials = Poly (means many) + nomials (means terms). Thus, a polynomial contains many terms

Thus, a type of algebraic expression with many terms having variables and coefficients is called polynomial.

Example: 3x , 5y²+2x+5, and 2x²+2

1Thank You

ANSWER

Prove that (a+b)cube=a3+ 3ab +b3through an activity

Posted by Shivam Dey 5 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Bhoomika . 5 years, 10 months ago

It can not be proved because (a+b)cube= a3+b3+3ab(a+b)

3Thank You

ANSWER

Find 5rational number between 4/9and-3/8

Posted by Sonia Walia 5 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

??Sumit Suman?? 5 years, 10 months ago

11/26, 17/36 , 35/72, 37/72 ,41/72,

2Thank You

ANSWER

√6x^2y+(2x+√6)y+3xy

Posted by Parth Raghuvanshi 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Write four rational no between -1and 1

Posted by Udbhav Raghuvanshi 5 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Sia ? 5 years, 10 months ago

We need to make the whole numbers as a rational number by multiplying and dividing the numerator and the denominator with the same number
Thus, We have,
-1 = $-\frac{1}{1}=\frac{-1 \times 10}{1 \times 10}=-\frac{10}{10}$
1 = $\frac{1}{1}=\frac{1 \times 10}{1 \times 10}=\frac{10}{10}$
So, $-\frac{9}{10}<-\frac{8}{10}<-\frac{7}{10}<-\frac{6}{10}<-\frac{5}{10}<-\frac{4}{10}<-\frac{3}{10}$
or - 1 $-\frac{9}{10}<-\frac{8}{10}<-\frac{7}{10}<-\frac{6}{10}<-\frac{5}{10}<-\frac{4}{10}<-\frac{3}{10} < 1$
$\therefore$ four rational numbers between –1 and 1 are
$-\frac{9}{10},-\frac{8}{10},-\frac{7}{10},-\frac{6}{10}$

1Thank You

ANSWER

The perimeter of a triangular field is 240dm.If two of its sides are 78dm and 50dm,find the length of the perpendicular on the side of length 50dm from the opposite vertex.

Posted by Annesha Mondal 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

0•001

Posted by Sanjaykumar Sanjay Kumar 5 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Sanjaykumar Sanjay Kumar 5 years, 10 months ago

001

2Thank You

ANSWER

5x^2_20xy

Posted by Sanjaykumar Sanjay Kumar 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Remainxer therom

Posted by Abhishek Sankar 5 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

Khushi Singh 5 years, 10 months ago

Remainder theorem

0Thank You

Rohit Dubey 5 years, 10 months ago

What do u need

0Thank You

ANSWER

Simplify 7root3/root10+root3 - 2root5/root6+root5

Posted by Siddhant Prasad 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

In a ∆ABC,AB=15cm,BC=13cm and AC=14cm.Find the area of ∆ABC and hence its altitude on AC.

Posted by Annesha Mondal 5 years, 10 months ago

CBSE > Class 09 > Mathematics

3 answers

Mahi Rathod 4 years, 3 months ago

hi I am boss

0Thank You

Ankit Maurya 4 years, 3 months ago

Hello I am Ankita I boss of 9class

0Thank You

Yogita Ingle 5 years, 10 months ago

In ∆ABC, AB = 15 cm , BC = 13 cm and AC = 14 cm.

By Heron's formula ,

S = ( A + B + C ) / 2

S = ( 15 + 13 + 14 ) / 2

S = 42 / 2

S = 21

Now, area of triangle

= √S (S–A) (S–B) (S–C)

= √21 (21–15) (21–13) (21–14)

= √21 (6) (8) (7)

= √7056

= 84 cm²

Again,area of triangle = 1/2×base×altitude=84 cm²

1/2×14×altitude = 84

7 × altitude=84

altitude = 84/7

Altitude = 12cm

Therefore, the area of ∆ABC is 84cm² and its altitude on AC is 12 cm.

3Thank You

ANSWER

3.3 bar express in the form p byq where p and q are integers and q not equal to 0

Posted by Aalok Rock 5 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Kanchi Singh 5 years, 10 months ago

x=3.3bar x=3.3333... -I 10x=33.333... -II II-I 10x-x =33.333... -3.333... 9x=30 x=30/9 x=10/3

5Thank You

ANSWER

5x^2 -3x+7-(x-1)

Posted by Chandan Singh 5 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 10 months ago

5x² -3x+7-(x-1)
= 5x2 - 3x + 7 - x + 1
= 5x² - 4x + 8

2Thank You

ANSWER

Evaluate after rationalizing the denomintor of 25/√40-√80,it being given that √5=2.226and √10=3.162

Posted by ??Sumit Suman?? 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Locate √9•5cm on nunber line

Posted by Shikhar Verma 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

A family spent Rs. 500 monthly as a fixed amount of milk and the extra milkcost Rs20 per kg. Taking quantity of extra milk as x and total expenditure of the milk as y write linear equation and draw the graph

Posted by Gargi Bisht 5 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Sia ? 5 years, 10 months ago

According to the question x is extra milk and y is the expenditure for the month
If the quantity of extra milk be 'x' and expenditure be Rs. 'y' then the given condition.
y = 20x + 500 (As Rs.500 is the fixed expenditure) ...(i)
Put x = 0 in equation (i)
y = 20(0) + 500 = 0 + 500
y = Rs.500

When no extra milk is taken the expenditure remains Rs.500 same
Put y = 1000 in equation (i)
1000 = 20x + 500
1000 - 500 = 20x
500 = 20x
x = $\frac{500}{20}=25 \mathrm{kg}$

When the 25 kg of milk is taken extra the expenditure increased as Rs.1000
Put x = 2 in equation (i)
y = 20(2) + 500
y = 40 + 500
y = Rs. 540
When the 2 kg of milk is taken extra the expenditure increased by Rs.40 i.e. Rs. 540

0	25	2
500	1000	540

2Thank You

ANSWER

Find five irrational number between 3 and 4

Posted by Malkeet Singh 5 years, 10 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Find five irretion number between 3 and 4

Posted by Malkeet Singh 5 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Sourav Dash 5 years, 10 months ago

19,20,21,22,23

1Thank You

ANSWER

Write the mirror image of the point (2,3)and (-4,-6) with respect to the X axis

Posted by Manish Chawan 5 years, 10 months ago

CBSE > Class 09 > Mathematics

3 answers

Sia ? 5 years, 10 months ago

The mirror image of point (2, 3) is (2, -3) with respect to x-axis.
The mirror image of (-4, -6) is (-4,6) with respect to x-axis.

2Thank You

Priya Bhagoria 5 years, 10 months ago

* mirror image of point (2,3) is (2,-3) with respect to x axis. * mirror image of (-4,-6) is (-4,6)

3Thank You

Yogita Ingle 5 years, 10 months ago

In image of a point P(x, y) with respect to x axis, the change in only sign of ordinate of point so the image is Q (x, -y)
So, the mirror image of the point (2,3) is (2 ,-3) and (-4,-6) is (-4,6)

2Thank You

ANSWER

Find the remainder when p(x) =4x-12x +14x-3 is divide by g(x) =x+2\3

Posted by Mahi Shajlana 5 years, 10 months ago

CBSE > Class 09 > Mathematics