17% of 17 + 18% of 18 = 19% of x then x is lying in the range
1) (20, 30) 2) (25, 35) 3) (35, 40) 4) (40, 45) 5) (15, 25) 6) (10, 20) 7) (5, 30) 8) (0, 20) 9) (35, 45) 10)None of these
17*17 + 18*18 = 19*x x = 613/19 = 32.26
So option 2.
17/100*17+18/100*18=19/100*x =>(17*117+18*18)/100=19/100*x =>189+324=19*x =>x=513/19 =>x=27 Therefore x lies between (20,30)
What is the range of the values of k such that k Cos A - 3 Sin A = k + 1
has a real solution?
How many integer solutions are there to the system of equations below and which are those solutions?
x^2+y-z = 42 x+y^2-z = 18
