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Earn +20 ptsQ: Solve the proportion 3 over 9 equals x over 81?
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How do you solve x squared equals negative 81?
x2=-81take the square root of both sidessince 81 is negative you need to take 81 times i when i=-1 then solve as the square root of 81. your answer is x=9i
How do you solve 3 to the power of negative 2x plus 2 equals 81?
3^(-2x + 2) = 81? log(3^(-2x + 2)) = log(81) (-2x+2)log(3) = log(81) -2x = log(81)/log(3) - 2 x = (-1/2)(log(81)/log(3)) + 1
What is 81 squared?
81 x 81 = 6561
What is 9 over 10 divided by 10 over 9?
9/10 divided by 10/9 equals 9/10 x 9/10 equals 81 /100
What to the second power equals 81?
It is: 9^2 = 81
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