A trip on a boat normally costs £26, but there is now a discount of 15%. Work out the cost of the trip after the discount.

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?

What is the slope of the line passing through the points (-5, 7) and (-3,5)?

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