Last month a museum received €21000 in donations. After taking off the cost of monthly bills,,the museum spent the remaining money on new exhibitions. the ratio of bills to donations was 5:14.How much did they spend on new exhibitions

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.

the answer is b

-3.5 is the distance.

i've had this question so choose the one in the absolute value sign.

i think the answer is b x = 1, y = 35/2