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Find m, if value of determinant |(m,2),(...

Find m, if value of determinant `|(m,2),(-5,7)|` is 31. a)14 b)3 c)4 d)12

A

14

B

3

C

28

D

21

Text Solution

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CHETANA PUBLICATION-Linear equations in two variables-EXERCISE
  1. The value of determinant |(5,2),(7,4)| is…………..a)6 b)-6 c)34 d)-34

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  2. If Dx=-18 and D=3 are values of determinant for certain simultaneous e...

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  3. Find m, if value of determinant |(m,2),(-5,7)| is 31. a)14 b)3 c)4 d)1...

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  4. If (a,3) lies on graph of equation 5x+2y=-4 then a=…………….a)2 b)-2 c)2/...

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  5. The simulataneous equations 3x+5y=16 and 4x-y=6 have……………a)unique solu...

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  6. If simultaenous equations do not have any solution,then their graph wi...

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  7. By Cramer's rule,the value of x is…………a)Dx/D b)Dy/D c) D/Dx d)D/Dy

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  8. Solve the following equations. 3x-y=2,5x-2y=1

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  9. Solve the following equations. 47x+31y=2,31x+47y=15

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  10. Solve the following equations. 4m+3n=18,3m-2n=5

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  11. Solve the following equations. 2x-3y=14,5x+2y=16

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  12. Solve the following equations. 1/3x+5y=13,2x+1/2 y=19

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  13. Solve the following equations. (1/3)x+(1/4)y=4,(5/6)x-(1/8)y=4

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  14. Solve the following equations. 64m-45n=289,45m-64n=365

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  15. Solve the following simultaneous equations: x+y=8,x-y=2

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  16. Solve the following simultaneous equations:3x+4y=-5,x-y=-4

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  17. Solve the following simultaneous equations: x+3y=7,2x+y=-1

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  18. Solve the following simultaneous equations: x+2y=5,2x+y=-2

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  19. Solve the following simultaneous equations: 4x-y=-5,2x-y=-1

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  20. Find the value of following determinant: |(5,-2),(-3,1)|

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