2328/4 show work
can you show me what to do at the end when i bring down the last number

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Having a hard time understanding this question (see attachment).

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate