A store is having a sale on books. If you buy the first book for $12, each additional book will cost $6. Which formula models this situation?

an = 12 + (n – 1) × 6

Step-by-step explanation:

The first book is 12 dollars so that is covered.

Secondly it says n-1 to exclude the first book.

Finally it is multiplied by 6 or the price of each additional book.

Hope This Helped :)

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.