Huilan is 5 years older than Thomas. The sum of their ages is 103. What is thomas's age

What is the range of the data below? .8090100

Simplify the expression. -2/5(10+15m-20n)

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