If `<7` then ` x<-7` b. ` xlt=7` c. ` x >-7` d. ` xgeq-7`

If x -7 d. -xgeq-7

If 7d .x>=-7

If (4a + 7b) (4c - 7d) = (4a - 7b) (4c + 7d), then which one of the following is correct ?

Let A(3, -4), B(9, -4), C(5, -7) and D(7, -7) . Show that ABCD is a trapezium.

Find the additive inverse of   5/7   is ( a ) 7/5 ( b ) 3/4 ( c ) -7/5 ( d ) -5/7

If a=-9, d= -7 , then t_(19) =

If a=-9, d= -7 , then t_(19) =

If (7a + 8b)/( 7c + 8d) = (7a - 8b)/(7c - 8d), prove that : a:b= c:d

If (7a + 8b) (7c - 8d) = (7a - 8b) (7c + 8d) : prove that a : b = c : d .

For simultaneous equations in variables x and y, D_x=49,D_y=-63 , D=7 then what is x? a) 7 b) -7 c) 1/7 d) -1/7