CBSE Class 9 Answered

can you explain me in more detail what a linear equation is?

Asked by | 10 Mar, 2013, 01:31: PM

Expert Answer

An equation of the form ax + by + c = 0, where a, b and c are real numbers, such that a and b are not both zero, is called a linear equation in two variables.

A linear equation in two variables has infinitely many solutions. The graph of every linear equation in two variables is a straight line.

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Answered by | 10 Mar, 2013, 03:05: 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

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CBSE 9 - Maths

3a= 16-4

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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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