Answer:
<u>Part A</u>:
(
is equal to all real numbers)
<u>Part B</u>:
![5+(-4)-12=-4-7,\\-11=-11\:\checkmark,\\\\5+0-12=0-7,\\-7=-7\:\checkmark,\\\\5+5-12=5-7,\\-2=-2\:\checkmark](https://tex.z-dn.net/?f=5%2B%28-4%29-12%3D-4-7%2C%5C%5C-11%3D-11%5C%3A%5Ccheckmark%2C%5C%5C%5C%5C5%2B0-12%3D0-7%2C%5C%5C-7%3D-7%5C%3A%5Ccheckmark%2C%5C%5C%5C%5C5%2B5-12%3D5-7%2C%5C%5C-2%3D-2%5C%3A%5Ccheckmark)
Step-by-step explanation:
<u>Part A</u>:
Given
, combine like terms:
![x-7=x-7](https://tex.z-dn.net/?f=x-7%3Dx-7)
Add 7 to both sides:
![x=x](https://tex.z-dn.net/?f=x%3Dx)
Since this is merely a true statement for all real numbers (reflexive property), this equation is true for any real value of
.
Therefore,
(
is equal to all real numbers).
<u>Part B</u>:
Using arbitrary values
as requested in part B, verify:
![5+(-4)-12=-4-7,\\-11=-11\:\checkmark,\\\\5+0-12=0-7,\\-7=-7\:\checkmark,\\\\5+5-12=5-7,\\-2=-2\:\checkmark](https://tex.z-dn.net/?f=5%2B%28-4%29-12%3D-4-7%2C%5C%5C-11%3D-11%5C%3A%5Ccheckmark%2C%5C%5C%5C%5C5%2B0-12%3D0-7%2C%5C%5C-7%3D-7%5C%3A%5Ccheckmark%2C%5C%5C%5C%5C5%2B5-12%3D5-7%2C%5C%5C-2%3D-2%5C%3A%5Ccheckmark)
2800 miles.
It takes one hour to go 350 miles, so if you multiply 350(miles) x 8(hours), you will get 2800.
Answer:
Okay Somebody Needs To Get The Guy Below OFF OF HERE
Step-by-step explanation:
Answer:
I would say A
Step-by-step explanation: