D +3
Since 6 and 3 are both positive
+ / += +
Answer:
a) 
b) 216 cm^2
Step-by-step explanation:
A) the area of one face of the cube, is the side length x the side length. As it is a cube, all sides are the same length, so we do c x c = 
There are 6 faces in a cube so we have to times one face by 6 to get 
B) c = 6
substituting this into the equation we made:
6 x (6)^2
6 x 36
216
So the surface area is 216 cm^2.
Hope this helps, let me know if you have any questions :)
Answer:
Step-by-step explanation:
6.7 – (-2.5)
2.5+6.7
6.7 + (-2.5)
-2.5+6.7
6.7-2.5
neither
-2.5-6.7
2.5-6.7
-6.7+2.5
60 times 21 divided by 100 is 12.6