What is the explicit formula for the arithmetic sequence –7.5, –9, –10.5, –12,

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers

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