Answer:

Step-by-step explanation:
We are required to simplify the following expression;

Using the properties of radicals;

The expression can be re-written as;

Now;

Answer:
68 +76
So we do 144/2=72
since its an 8 foot difference subtract 72-4 and 72+4 we get 68 and 76 hope this helped!
The first one is D. (2+11)7=7(2+11)
I'm not sure of the second one, I apologize.
Answer:
$18515.24
Step-by-step explanation:
27000 x .91
24570
24570 x .91
22358.7
22358.7 x .91
20346.417
20346.417 x .91
18515.23947 =
$18515.24
Your final answer would be 73, because you would have to plug in 5 for Y.