Ms. callahan works hard to budget and predict her costs for each month. she is currently attempting to determine how much her cell phone company will likely charge her for the month. she is paying a flat fee of $80 a month for a plan that allows for unlimited calling but costs her an additional twenty cents per text message. a. write a function, c(t), for ms. callahan's current cell plan that will calculate the cost for the month based on the number of text messages she makes. b. find c(20) d. find c(t) = 100 c. find c(45) e. find c(t) = 90 f. at what number of texts would $20 unlimited texting be less expensive then her current plan?

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average

Simplify the expression below -3(10x+4y)+6(6x-2y)