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CBSE Class 9 Answered

A linear equation 3x+4y=7 has a unique solution in the set of natural number.State true/false and justify your answer
Asked by Siddhant Jain | 18 Oct, 2013, 09:02: PM
Expert Answer
Yes the given statement is true.
 
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Answered by Vimala Ramamurthy | 18 Oct, 2013, 11:40: 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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