Triangle ABC is similar to triangle DEF with a ratio of 3/5. If the difference of their perimeters is 40 inches, find the perimeter of each triangle.

The late fee for library books is $2.00 plus 15¢ each day for a book that is late. if maria’s fee for a late book was $3.20, write and solve a linear equation to find how many days late the book was.

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!

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