Caitlin has a $10 gift certificate to the music store. she has chosen a number of cd's from the $7 bargain bin. if the cost of the cd's is $32 after the gift certificate is credited, how many cd's did caitlin but?

Step-by-step explanation:

Givens:

Basically, to answer this question, we have to find the total number of cd's that she bought in such way that after the discount, she pays only $32.

If we think about, 6 cd's cost 6(7)=42, that is, $42, now with the $10 discount, she would pay only $32, which is the final price shown in the problem.

Therefore, Caitlin bought 6 cd's.

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.

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1