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CBSE Class 9 Answered

give me two solutions for 3y+4=0
Asked by | 11 Dec, 2011, 12:19: AM
answered-by-expert Expert Answer
If 3y+4=0 is taken as linear equation in one variable, then it has only one solution: y = -4/3
If 3y+4=0 is taken as linear equation in two variables, then it has many solutions and two of them are: (1, -4/3) and (2, -4/3).
Answered by | 12 Dec, 2011, 09:34: AM

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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
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Asked by Mn2790976 | 19 May, 2022, 09:45: AM
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CBSE 9 - Maths
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Asked by nisalya.thakkar | 13 May, 2022, 09:01: PM
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CBSE 9 - Maths
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Asked by diesh2323 | 08 May, 2022, 05:06: PM
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CBSE 9 - Maths
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Asked by bhagwanlalvairagi | 04 Apr, 2022, 04:48: PM
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CBSE 9 - Maths
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CBSE 9 - Maths
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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.
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