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The solution of the system x+y-3z=-6, -7...

The solution of the system `x+y-3z=-6, -7y+7z=7, 3z=9` is

A

`x=-1,y=-2,z=3`

B

`x=-1,y=2,z=3`

C

`x=-1,y=-2,z=3`

D

`x=1,y=2,z=3`

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The correct Answer is:
A, D
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PREMIERS PUBLISHERS-ALGEBRA-SOLUTION TO EXERCISE 3.19 (Multiple Choice Questions)
  1. A system of three linear equations in three variables is inconsistent ...

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  2. The solution of the system x+y-3z=-6, -7y+7z=7, 3z=9 is

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  3. If (x-6) is the HCF of x^(2)-2x-24 and x^(2)-kx-6 then the value of k ...

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  4. (3y-3)/(y)÷(7y-7)/(3y^(2)) is

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  5. y^(2)+(1)/(y^(2)) is not equal to

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  6. (x)/(x^(2)-25)-(8)/(x^(2)+6x+5) gives

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  7. The square root of (256x^(8)y^(4)z^(10))/(25x^(6)y^(6)z^(6)) is equal ...

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  8. Which of the following should be added to make x^(4)+64 a perfect squa...

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  9. The solution of (2x-1)^(2)=9 is equal to

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  10. The values of a and b if 4x^(4)-24x^(3)+76x^(2)+ax+b is a perfect squa...

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  11. If the roots of the equation q^(2)x^(2)+p^(2)x+r^(2)=0 are the squares...

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  12. Graph of a linear polynomial is a

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  13. The number of points of intersection of the quadratic polynomial x^(2...

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  14. For the given matrix A=[(1, 3, 5, 7), (2, 4, 6, 8), (9, 11, 13, 15)] t...

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  15. If A is a 2times3 matrix and B is 3times4 matrix, how many columns doe...

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  16. If number of columns and rows are not equal in a matrix then it is sai...

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  17. Transpose of a columns matrix is

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  18. Find the matrix X if 2X+[(1, 3), (5, 7)]=[(5, 7), (9, 5)]

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  19. Which of the following can be caluculated from the given matrices A=...

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  20. If A=[(1, 2, 3), (3, 2, 1)], B=[(1, 0), (2, -1), (0, 2)] and C=[(0, 1)...

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