Answer:
-6m + 8
Step-by-step explanation:
Distribute -2 to all terms within the parenthesis. Multiply. Note that:
- Two negative numbers multiplied will equal a positive answer.
- One negative & one positive number multiplied will equal a negative answer.
- Two positive numbers multiplied together will equal a positive answer.
-2(3m - 4) =
-2(3m) = -6m
-2(-4) = 8
-6m + 8 is your answer.
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Hey,
Variance is standard deviation squared, so in order to find the standard deviation of 121, you would take the square root
Hoped that Helped
Answer:
The simple pendulum should be 15.9 m long.
Step-by-step explanation:
Approximately (for small amplitudes), the period of a simple pendulum is
T = 2*pi * sqrt (L/g), L=length
using pi = 22/7, and g=9.8 m/s^2
8 = 2* 22/7 * sqrt(L/9.8)
solve for L
L = (8*7/(2*22))^2 * 9.8
= 15.874 m
That's quite a long pendulum!
The rate of growth in the tree is 4 feet per year.
Height of tree at year 0 = 2 feet
Height of tree at year 1 = 6 feets
Height of tree at year 0 = 10 feets
Therefore, the difference in the heights of the tree from the previous year will be:
= 6 feet - 2 feet.
= 4 feet
In conclusion, the correct option is B.
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