The stem-and-leaf plot lists the ages of customers in a bookstore. How many customers are 19 or younger?

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For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

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

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