What is the length of the hypotenuse?

Need same math paper but the back now i hope your able to read it cleary i need with hw

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4

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