Which of the following pairs of functions are inverse of each other? A. f(x)=x-8/4+9 and g(x)=4(x+8)-9 B. F(x)=3(x/2)-4 and g(x)=2(x+4)/3
C. F(x)=3(2/x)-10 and g(x)=x/6+10
D. f(x)=4(x-12)+2 and g(x)=x+12/4-2
Plz help

B

Step-by-step explanation:

Y = 3x/2 - 4

replace the variables to find the inv function

x = (3y/2)-4

solve for y

×+4 = 3y/2

2(x+4) = 3y

y = 2(x+4) /3

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional