Can some one with two questions 1) which expression is not equivalent to the other expressions? -6(2x - 4) -(12x - 6) + 18 -3(4x - 3) + 15 -4(3x + 6) 2) all of the following are equivalent except -5(x - 1) -5x + 5 5 - 5x (5 - 5)x

Step-by-step explanation:

These are fairly easy to see when each expression is put into the same simplified form.

-6(2x -4) = -12x +24

-(12x -6) +18 = -12x +24

-3(4x -3) +15 = -12x +24

-4(3x +6) = -12x -24 . . . . not equivalent

-5(x -1) = -5x +5

-5x +5 = -5x +5

5 -5x = -5x +5

(5 -5)x = 0 . . . . not equivalent

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.

answer is (b.

164 ft2)

a base  

18

b base  

7

h height  

8