If f(x)=3 x - 7 x ,g(x)= X + 2 / 5 and g-1 of (x )=f(x) find the value of x​

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

i believe the answer is the polygon, heptagon.