Answer:
D) 4
Step-by-step explanation:

Consider,

. Let's say

then the problem reduces to

. (Do you understand this step?)
So then replacing a again with our definition we get,

.
Answer:
Step-by-step explanation:
You have to start out with the distributive property 5 times 2 times c is 10+5c; now you have to subtract 5c on both sides in the upside down T chart, now its 10=45+c and your answer will be c=4.5.
The square root of 169 is 13 and 170 is 13.03
8 as that means what two of the same number makes up , in this case 64. 8x8=64