(05.05)On the coordinate plane below, what is the length of AB? A coordinate plane is shown with the following points A at negative 7, 4; B at 8, 4; C at 8, negative 3; D at negative 7, negative 3. All points are connected to create a rectangle.

7 units
8 units
15 units
16 units

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

i agree because i see the other persons thinking is clear

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72