Afunction f ( x ) is said to have a removable discontinuity at x = a if: 1. f is either not defined or not continuous at x = a . 2. f ( a ) could either be defined or redefined so that the new function is continuous at x = a . let f ( x ) = 2 x 2 + 4 x − 48 x − 4 show that f ( x ) has a removable discontinuity at x = 4 and determine what value for f ( 4 ) would make f ( x ) continuous at x = 4 . must define f ( 4 ) = .

The monthly texting plan of all star cell is $11 per month and $0.25 per text. the monthly texting plan of top line cell is $14 per month and $0.15 per text. a student wants to set up a system of equations to find the number of texts for which the total monthly cost of the two companies is the same. he uses the variables x and y. he lets y represent the total monthly cost. what will x represent? x = number of texts x = cost of the total number of texts x = total monthly cost x = cost of each text