Question

Karen buys a picture frame on sale for $9. A week later she buys the same frame for the regular price. The total price for the frames is $21.

Which equation could be used to find the cost (x) of the second frame? A) $21x = 9 B) $9x = $21 C) x + $9 = $21 D) x − $9 = $21 E) None of the above


What is the regular price of the frame?

A) $10 B) $12 C) $14 D) $16 E) None of the above

Answer 1

C) x + $9 = $21

B) $12

Answer 2

Part (A): The correct option is C) x + $9 = $21

Part (B): The correct option is B) $12

Explanation:

Consider the provided information.

Part (A)

Karen buys a picture frame on sale for $9.

A week later she buys the same frame for the regular price.

Let the regular price is x dollar.

The total price for the frames is $21.

Therefore the required equation is:

`x+9=21`

Hence, the correct option is C) x + $9 = $21

Part (B) Find the regular price.

Consider the equation
`x+9=21`

Solve the equation for x.

`x+9-9=21-9`

`x=12`

Hence, the regular price of the frame is $12.

Therefore, the correct option is B) $12