Answer:
true, to my knowledge concentric circles are just circles that all have one main center.
Step-by-step explanation:
It's 12 because if you divide 6 by 0.5 you should get 12, so basically use the opposite operation.
Hope that helps!
Answer:
1.78
Step-by-step explanation:

To solve for x we need to cross multiply it
We have = sign inbetween the fractions so we cross multiply it
9*x = 2* 8
9x = 16
Now we divide by 9 on both sides

so x= 1.7777777778
When we round to two decimal places then
x= 1.78
Let

be the identity matrix. Then pick whatever matrix you like for

.