Correct answer only ! i cannot retake what are the domain restrictions of the expression. select each correct answer.

Which expression is equivalent to 5r6141 2r+st6

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse