15 INCREASED BY T IN ALGEBRAIC EXPRESSION

my answer is t + 15

9 dollars less than b in algebraic expression.
My answer is b - 9 am i right or wrong?

Both are right.

Do you respond?

For the first question, "15 increased by t" can be expressed as t + 15. You are correct.

For the second question, "9 dollars less than b" can be expressed as b - 9. So you are indeed correct again. Well done!