Three items were bought at a car boot sale. Item A
Mass = 42 grams
Volume = 2 cm
Item B
Mass = 87.5 grams
Volume = 5 cm
Item C
Mass = 147 grams
Volume = 7 cm
The density of platinum is approximately 21 grams per cm".
Which of the items cannot be platinum?
You must show your working.

true

Step-by-step explanation:

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

cutt.ly/kzH1l58

Ifound your complete question in other sources.  see attached image, .  we have the following transformation:   t4.5, -6.2  which means:   t (x + 4.5, y - 6.2)  we have then that the vertices of the triangle follow the following rule:   a (x, y) > a '(x + 4.5, y - 6.2).  we have then that for point c  c (a, b) > c '(a + 4.5, b - 6.2)  the coordinates are:   c '(- 1, -3)  thus,  -1 = a + 4.5  a = -5.5  and  -3 = b - 6.2  b = 3.2  the vertex c will then be:   c (-5.5, 3.2)  answer:   the coordinates of point c of the pre-image are:   c (-5.5, 3.2)