If f(x) =2x/7+4 ,which of the following is the inverse of f(x)?

a. f¹(x)=2(x+4)/7
b. f¹(x)=2(x-4)/7
c. f¹(x)=7(x-4)/2
d. f¹(x)=7(x+4)/2

Step-by-step explanation:

f(x) = (2x / 7) + 4change f(x) to y

y = (2x / 7) + 4switch ur x and y and solve for y

x = 2y/7 + 4subtract 4 from both sides

x - 4 = 2y/ 7multiply by 7

7(x - 4) = 2ydivide by 2

7(x - 4) / 2 = y answer C

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!