A survey of 75 customers was taken at a bookstore regarding the types of books purchased. The survey found that 49 customers purchased mysteries, 41 purchased science fiction, 35 purchased romance novels, 24 purchased mysteries and science fiction, 21 purchased mysteries and romance novels, 16 purchased science fiction and romance novels , and 7 purchased all three types of books.

Asquare has a perimeter of sixteen centimeters. what is the length of each of its sides? a. 8 cm c. 9 cm b. 4 cm d. 10 cm select the best answer from the choices

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?