Acell phone company charges a basic rate of $19.99 per month for 300 minutes of local usage. any local usage over 300 minutes is charged at $.10 per minute. all long distance calls are charged at $.25 per minute. write and simplify an expression that gives the total monthly bill if x is the number of local minutes and y is the number of long distance minutes. evaluate the expression if local usage totals 375 minutes and long distance usage totals 54 minutes.

total = 19.99 + 0.10(x-300) + 0.25y

x = 375

y=54

total = 19.99 +0.10(375-300) +0.25(54)

total = 19.99 + 0.10(75) + 0.25(54)

total = 19.99 + 7.50 + 13.50

total = $40.99

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

step-by-step explanation: