Select the correct answer. For which function is f(x) equal to f-1(x)?
A. x+6/x-6

B. x+2/x-2

C. x+1/x-1

D. x+5/x-5

the answer is d

step-by-step explanation:

y+3=-4(x-2)

y+3=-4x+8

  -3         -3  

y=-4x+5

we need to divide the number of toy dinosaurs, 156, by the number of brothers, 4:

in order to estimate, we can use compatible numbers:

156 ÷ 4

  ↓

160   ÷ 4 = 40        

the correct answer is a).