Mary palm's checking account had a starting balance of $785.63. she wrote a check for $57.00 for groceries and a check for $125.00 for a car payment. yesterday she deposited $57.25 in her checking account. what is mary's current balance?

a. $603.63
b. $660.88
c. $554.26
d. $796.38

answer: the correct one is a

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.