a cell phone provider offers a plan that costs $30 per month plus $0.20 per text message sent or received. a comparable plan costs $40 per month but offers unlimited text messaging. how many text messages would have to be sent or received in order for the plans to cost the same each month?

3. find the radius of circle p.4. find y.

Find the coordinates of point x that lies along the directed line segment from y(-8, 8) to t(-15, -13) and partitions the segment in the ratio of 5: 2.

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212