I. 3x²-14x+15=0

II. 15y²-34y+15=0

I. 3x²+13x+14=0

II. 8y²+26y+21=0

I. 3x²+11x+10=0

II. 2y²+13y+21=0

I. 4x²+17x+15=0

II. 3y²+19y+28=0

At present, Pia is 6 years older to Ray. The respective ratio between the present ages of Pia and Mini is 3:4. At present Ray is 14 years younger to Mini. What is Ray's present age

Two equal circles are drawn in square in such a way that a side of the square forms diameter of each circle. If the remaining area of the square is 42 cm2, how much will the diameter of the circle measures? (in cm)