4) Kai has 20 songs on his playlist, and is adding 2 songs per minute. Write an equation
that represents this situation, where y is the
number of songs on Kai's playlist after x
minutes.

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

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?

Which expression is equivalent to 64 - 9x^2?