If the number is n then
square of 2 times a number
square of 2n
(2n)²
that was your mistake, because (2n)²=4n², not 2n²
the result is 81
(2n)²=81
square root both sides
remember positive and negative roots
2n=+/-9
divide by 2
n=+/-4.5
n=4.5 or -4.5
Answer:
.0065
Step-by-step explanation:
You move the decimal backwards 3 times
The answer is b because it changes orientation when flipped, but does not change size.
Answer:
86
Step-by-step explanation:
