Solve by graphical method : x + 2y =5; y = -2x -2 (3)
Solve by Cramer’s rule. 3x+2y+11=0; 7x – 4y = 9. (3)
Find value of k for which the given equations have infinitely many solutions. Kx – y + 3-k =0; 4x – ky + k = 0. (3)
Sum of two numbers is 97. If the larger number is divided by the smaller, the quotient is 7 and the remainder is 1. Find the numbers. (3)
Students of a school were made to stand in rows for drill. If 3 students less were standing in each row, 10 more rows were required and if 5 students more were standing in each row then the number of rows was reduced by 10. Find the number of students participating in the drill.
+
= 85;
+
= 89