Evaluate the function when x=1 f(x) = 1/2x -1

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?

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

The reflexive property of congruence lets you say that ∠pqr ≅