Write the sum using summation notation, assuming the suggested pattern continues.
64 + 81 + 100 + 121 + + n^2 +

Can someone me with these two circle theorem questions asap?

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

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?