0=x^2+4x+1 Rewrite the equation by completing the square

Which image (a’ b’ c’ d’) of abcd cannot he produced using only reflections ?

Which is the best estimate of the product of 0.9 x 0.88? 0 0.25 0.5 1

Kilgore trout creates a new scale to diagnose depression. however, his scale only assesses one symptom of depression while ignoring others. which of the following is his new scale most likely lacking? a) test-retest reliability b) discriminant validity c) criterion validity d) alternate-forms reliability e) content validity f) none of the above