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Properties of Inequalities

3x-4y=7 and x...

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3x-4y=7 and x+cy=13,for what 'c' the equations not have a solution A.3/4 B.4/3 C.-4 D.-4/

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3 x - 4 y = 7

x + c y = 13

, for what value of

c

will the two equations not have a solution ?

Q. Given 3x - 4y = 7 and x + cy = 13 for what value of "c" will the two equation not have a solution ?

Q. For what value of "

c

" will the equations

3 x - 4 y = 7

x + c y = 13

have no solution?

Choose correct alternative for each of the following questions
(1) To draw graph of 4x +5y = 19, Find y when x = 1.

(2) For simultaneous equations in variables x and y, D_x= 49, D_y = –63, D = 7 then what is x ?

\frac{1}{7}

\frac{- 1}{7}

(3) Find the value of

|\begin{matrix} 5 & 3 \\ - 7 & - 4 \end{matrix}|

(4) To solve x + y = 3 ; 3x – 2y – 4 = 0 by determinant method find D.

(5) ax + by = c and mx + ny = d and an ≠ bm then these simultaneous equations have -

(A)	Only one common solution.	(A)	No solution.
(C)	Infinite number of solutions.	(D)	Only two solution.

Check whether the value given in the brackets is a solution to the given equation or not:

(a) n + 5 = 19 (n = 1) (b) 7n + 5 = 19 (n = − 2)

(c) 7n + 5 = 19 (n = 2) (d) 4p − 3 = 13 (p = 1)

(e) 4p − 3 = 13 (p = − 4) (f) 4p − 3 = 13 (p = 0)

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