Answer:

Step-by-step explanation:

<u>Use quadratic formula:</u>


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Answer:
so 80 plus 20 is a 100
Step-by-step explanation:
thats it
The answer is (D) or 1728 In³
Answer:
B.) 18
Step-by-step explanation:
To find the correct b value we use this formula
b² - 4ac = 0
b = What we are solving for
a = 1
c = 81
b² - 4(1)(81) = 0
b² - 324 = 0
b² = 324

b = ±18
And 18 is one of the answer choices
So B.) 18 is the correct answer.
We need the rest of the question :)