The current year in the chinese calender is 4715. the digits in 4715 are rearranged to form all possible 4-digit whole number arrangements. find the sum of all such whole numbers.

113322

Step-by-step explanation:

There are 4! = 24 possible combinations.  Those combinations are:

1457, 1475, 1547, 1574, 1745, 1754,

4157, 4175, 4517, 4571, 4715, 4751,

5147, 5174, 5417, 5471, 5714, 5741,

7145, 7154, 7415, 7451, 7514, 7541

The sum of those 24 combinations is 113322.

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.

d

because parallelagram have all 4 angels the same size dependeing and a rectangle and square are oth parallelogram