What is the sum of the complex number 2+3i and 4+8i, where i=√-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?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Find the values of y: 3y^3(y^2+ 2/3y)=0