if (90 < = x <= 100)

It should be rewritten as:

if (90 < = x <= 100):

if (90 < = x and <= 100):

if (90 < = x and x <= 100):

Nothing, the if statement is correct

It should be rewritten as:

if (90 < = x <= 100):

if (90 < = x and <= 100):

if (90 < = x and x <= 100):

Nothing, the if statement is correct