1. How many combinations with repetition are allowed if n = 4 and r = 3?
9
10
27
20​

The verbal translation for the difference of m and 7 increased by 15

What dimensions can créate more than one triangle ?

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