Ashley had a doll collection consisting of 43 dolls. As she got older she ended up selling some. She only kept her 12 favorite dolls. What was her percent of change?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?