Origin and scale

(6)

10.The solution set of equation 4x²-16=0 is: (+-2)

11.Number of way to solve quadratic equation are: (-----)

12.In 3x²+4x=5 the co-efficient of x² is: ((-----))

13.If b=0 in a quadratic equation ax² +bx +c=0, then it is called: (-----)

14.The number of real roots of the equations |x|²-5|x|+6=0, is: (-----)

15.If x2-x+1=3, then the value of 1 +x-x² is equal to: (-----)

16.2x+3= 4 is called: (1/2)

17.The discriminant of ax²+bx + c= 0 is: (-----)

18.30% of 30= (9)

19.159% of 60= (95.4)

20.1/4= (0.25)

21.0.05= (1/20)

22.If 100% of a number is 15, what is 50% of the number? (7.5)

23.If 10% of a number is 7, what is 80% of the number? (56)

24.Which is the greatest? (???????)

25.The original price of a toy was $ 15. If the price is reduced by 20%, what is the new price of the toy?