Solve 10 X + 8 / 2 X + 7 is equal to 4 ​

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent 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