Another math problem! this is all the information it gives me!
1+cos(6x)=
a. 2cos^2(3x)
b. 2sin^2(3x)
c. 3sin(2x)
d. 3cos(2x)

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