HELP MEWhich expression has been simplified correctly? Select two answers. A. ( 5 − 3 ) − 2 ( 5 2 ⋅ 5 ) 2 = 1 5 12 B. 3 3 ( 3 2 ⋅ 3 ) 2 = 1 3 C. ( 2 3 ⋅ 2 4 ) − 8 ( 2 2 ⋅ 2 5 ) 3 = 1 2 77 D. 7 − 2 ( 7 5 ) − 8 = 7 38

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

We just started the introduction into circles and i have no idea how to do this.

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