<h3>
Answer:</h3>
The expression is undefined when x=3 or -3
<h3>
Solution:</h3>
- An expression is undefined when it's divided by 0.
- In order to make the denominator equal 0, we need to subtract 9-9.
- Notice that x is squared.
- So x times itself should equal 9. What number is it?
- That's right, 3.
- So we have
- 9-(3)^2=9-9=0
- There's also another solution: x=-3 (-3•(-3)=9
Hope it helps.
Do comment if you have any query.
No because an acute triangle is less than 90 degrees and a right angle is 90 degrees so it doesn't work.
-2-(+7) is the same thing at -2-7 which is -9

is the same thing as

which is

or

Last but not least the last one is the Associative Property based on definition listed below :)
Associative Property:<span> When three or more numbers are added, the sum is the same regardless of the grouping of the addends. For example (2 + 3) + 4 = 2 + (3 + 4)</span>
B: -8
8 times 1 = 8, and since there is a negative in front of the 1 when you are multiplying, it should be -8/
Answer: I really don't know how to do this sorry
Step-by-step explanation: