Answer:
4 inches
Step-by-step explanation:
We can set up a proportion to find out the length value (assuming x is the length of the frame)

We multiply 12 and 3...

And divide by 9...

So, the length of the frame is 4 inches.
Hope this helped!
Answer:
$76.80
Step-by-step explanation:
When a product has a certain markup, you need to multiply the markup by the price of the product, and then add that to the original price of the product. 20%=0.2, and 0.2*64=12.8. Adding this to the original price, you get 64+12.8=$76.80. Hope this helps!
6.4 ounces.
You can get this by first converting to ounces which is a smaller value. Then you can divide by 10.
Step-by-step explanation:
1/3(6+3)
= 1/3(9)
= 3
......