The next three terms of the sequence 20, 40, 80, 160,… are 320, 640, and 1280.

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?

When only separate discreet points are graphed it is called?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?