At a local electronics store, cds were on sale. some were priced at $14.00 and some at $12.00. sabrina bought 9 cds and spent a total of $114.00. how many cds did she purchase?

The number of CD costs  $ 14.00 are 3 and CD costs $ 12.00 are 6.

Step-by-step explanation:

Let x be the number of CD costs $ 14.00 and y be the number of CD costs $ 12.00

Since, total CDs = 9

⇒ x + y = 9

⇒ x = 9 - y (1)

Also, total spending in both type of CD = $114.00,

⇒ 14x + 12y = 114

From equation (1),

14(9-y) + 12y = 114

126 - 14y + 12y = 114

126 -2y = 114

-2y = -12

y = 6

Again by equation (1),

x = 9 - 6 = 3

Hence, the number of $ 14.00 cost CD are 3 and $ 12.00 cost CD are 6.

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.