Paint is mixed 3 parts blue to 1 part white in order to lighten it.   sam needs 12 litres of paint. how much blue and white paint will be needed? he will need ? ?   litres of blue paint. he will need ? ?   litres of white paint.

Sam will need 9 liters of blue paint.

and 3 liters of white paint.

Step-by-step explanation:

Paint is mixed 3 parts blue to 1 part white.

i.e. if 3x liters of blue paint is taken than x liters of white paint is needed.

Sam needs 12 liters of paint.

i.e.   3x+x=12

⇒ 4x=12

Dividing both sides by 4,we get

x=3

Blue paint=3x=3×3=9 liters

White paint=x=3 liters

Hence, Sam will need 9 liters of blue paint.

and 3 liters of white paint.

50

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.