Factor: 64v^4 - 225w^10

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 of the following vectors are orthogonal to (2,1)? check all that apply

Is the ordered pair (-10, 7) a solution to the equation y = 17 – x? yes or no