Only do this if you ACTUALLY have an answer please. 1.) 7r + 9 - 3 - 2r *

2.) 4w + w *

3.) 6h + 9h *

4.) -4 + 7d - 9d + 2 *

5.) 7z - 6z + 4 + 8 *

6.) 8y - 2y - 6 *

7.) 7d + 2 - 3d - 4 *

8.) c + 3c *

9.) 5s - 4s *

10.) 2c - 7 - 6c *

1) 5r+6

2) 5w

3) 15h

4) -2d-2

5) 1z+12

6) 6y-6

7) 4d-2

8) 4c

9) 1s

10) -4c-7

Step-by-step explanation:

i dont know

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.