N: This is the sum the numbers in a set, divided by the number of items in the set
e: For example, this of the set (2,4,6,8,10) is equal to (2+4+6+8+10)/5 = 6.

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

With finding limits of multi variable !

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