CBSE Class 9 Answered

how to make an equation

Asked by | 28 Feb, 2008, 11:41: AM

Expert Answer

Let us see u'r query by follwing example

The cost of pencil is twice the cost of rubber.

The equivalent linear equation in two variables of above statement is

Solution

Let the cost of pencil be p and the cost of rubber be r.

The cost of pencil is equal to the twice the cost of rubber.

This means p=2r

Answered by | 28 Feb, 2008, 12:01: PM

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CBSE 9 - Maths

A lending library has a fixed charge for the first three days and an additional charge for each day there after. Neeru paid Rs. 21 for a book kept for five days . Write a linear equation which satisfies this data. Draw trhe graph for the same.

Asked by manmeetsaini1516 | 30 Jun, 2022, 09:36: AM

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CBSE 9 - Maths

Two cell phone companies offer different packages. Company A charges a fixed monthly fees of Rs 34 plus Rs 0.5/ minute talk time. Company B charges a fixed monthly fees of Rs 40 plus Rs 0.4 / minute talk time. Take x as the charges per minute for the talk time and y as the total amount. Based on above information answer the following question: (i) Linear equations representing the packages of a company A and B are : (a) y=34 + 0.5 x, y= 40 +0.4 x (b) y=34 + 0.4 x, y= 40 +0.5 x (c ) x=34 + 0.5 x, y= 40 +0.4 y (d) x=34 + 0.4y, y= 40 +0.5y (ii) If the average number of minutes used monthly by Sunil is 1160, then which of the following is true? (a) Company A offers the better package (b)Company B offers the better package (c ) Both companies offer the same package (d) None of the above (iii) If Sunita pays a total bill of Rs 208 to company B then the number of minutes used by her : (a) 400 (b) 420 (c) 410 (d)390 (iv) The shape of the graph represented by the equations in part (i) is : (a) Rectangle (b) Circle (c) Parabola (d) Pair of lines (v) The number of minutes of talk time that results in equal monthly bills from both the companies is : (a) 50 (b) 60 (c) 55 (d)65

Asked by snehameenu656 | 31 May, 2022, 11:12: PM

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CBSE 9 - Maths

7. A number consists of two digits whose sum is 12. If 18 is added to the number, the digits are reversed. Find the number.

Asked by Mn2790976 | 19 May, 2022, 09:45: AM

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CBSE 9 - Maths

if this is a ball that cost 20 ruppe and a bat that cost 100 ruppe but the bat cost 10 ruppe more what is the total cost of ball and bat ?

Asked by nisalya.thakkar | 13 May, 2022, 09:01: PM

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CBSE 9 - Maths

draw the graph of 3 X + 4 Y = 7. find the coordinates of the point which intersects x axis and y axis

Asked by diesh2323 | 08 May, 2022, 05:06: PM

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CBSE 9 - Maths

if p = 100r - t . find value of p where r = 0.25 and t = 10

Asked by bhagwanlalvairagi | 04 Apr, 2022, 04:48: PM

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CBSE 9 - Maths

In a schoo the number of students are 150 out of 150 students .If the girls are 50 more than boys form a linear equation for this data and draw the graph . For this graph find the number of boys and number of girls

Asked by kalamathanomkeshwarrao | 07 Nov, 2021, 04:08: PM

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CBSE 9 - Maths

3a= 16-4

Asked by dineshkamar8546 | 06 Sep, 2021, 08:16: PM

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CBSE 9 - Maths

2x+3x=

Asked by lakha2647 | 28 Jul, 2021, 05:20: PM

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CBSE 9 - Maths

The car is moving with a speed of 60 km/h, travels y km distance in x hours. Represent this statement as a linear equation of two variables and draw the graph. Read from the graph, distance travelled when time is (i) 5 hours, (ii) 10 hours.

Asked by suhasinikhuba | 21 Jun, 2021, 08:00: PM

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CBSE Class 9 Answered

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