D. Multiply the 1/4 amount by 10, which is how much it took to get the 2ft to 20ft.
Answer:
the roots are n = 1 + √15 and n = 1 - √15
Step-by-step explanation:
In this case I would immediately rewrite n² - 2n - 5 = 10 as
n² - 2n = 10 + 5 = 15.
To complete the square: Identify the coefficient of n (it is -2). Halve that, obtaining -1, square this result, and then add the outcome (1) to and subtract the outcome (1) to n² - 2n:
n² - 2n <em>+ 1 - 1 </em> = 15
Next, rewrite n² - 2n + 1 as the square of a binomial:
(n - 1)² = 15
Finally, take the square root of both sides:
n - 1 = ±√15
so that the roots are n = 1 + √15 and n = 1 - √15
Answer:
Step-by-step explanation:
When you are dividing exponents, you subtract them.
which gives you
You can check your work by writing it all out
The 3 4s in the denominator will cancel out 3 4s in the numerator.
You are left with only 6 4s in the numerator, which is