Jesse needs 13 gallons of paint to finish painting the exterior of his band .if he uses 10 quarts of paint for the doors ,how many quarts will be left for the siding on the barn

1 Gallon = 4 quarts

13 gallons = 4x13 = 52

Since he used 10 quarts

52 q - 10 q = 42 quarts

42 quarts would be left for the sliding on the barn.

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.