2/4 * 4/8

please give me the correct 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 of the following expressions is equal to 2x^2+8

State if the two triangles are congruent. if they are, state how you know?