Good evening ,
Answer :
A.
x = ±20
Step-by-step explanation:
x² − 1 = 399 ⇔ x²= 400 ⇌ x² = 20² ⇌ x² − 20² = 0 ⇌ (x-20)(x+20) = 0
⇌ x = 20 or x = -20.
:)
25.08 I think (the answer needs to be 20 characters long)
Answer:
<u>gusuhuysh7zywjis</u><u> </u><u>uh</u><u> </u><u>sksisyysishs</u>
Answer:
A. 770,000,000
Step-by-step explanation:
7.7x10^8 First step is to simplify
7.7x100,000,000 Then, multiply
770,000,000
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Have a good day! :)