Answer:
True
Step-by-step explanation:
There are an odd number of negative signs (3)
If there is an odd number it is negative, but if it is even then the result will be positive
Here's a deeper explanation
-1 times -1 is simply 1
Then 1 times -1 is -1
Our final answer is -1 so this is true.
Left side:
1-sin²(x) = cos²(x)
1-sin²(x) / cos(x) = cos²(x) / cos(x) = <em>cos(x)</em>
Right side:
sin(2x) = 2 sin(x) cos(x)
sin(2x) / 2 sin(x) = 2 sin(x) cos(x) / 2 sin(x) = <em>cos x </em>
Answer:
The price per inch is $0.26.
Step-by-step explanation:
There are 12 inches in 1 foot.
First, we need to calculate what the cost is per foot.
18.72 / 6 = 3.12
From this answer, we have to divide by 12 to calculate what the price is per inch.
3.12 / 12 = 0.26
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Answer:
c. The occurrence of the site references in the paper are independent events.
Step-by-step explanation:
For each reference, there are only two possible outcomes. Either it is still good two years later, or it has vanished. So we should try to use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
However, the binomial probability distribution can only be used if the events are independent from each other.
So the correct answer is:
c. The occurrence of the site references in the paper are independent events.
Answer: The quotient of a number x and 6 is 8.7.
x/6 = 8.7
Three times of a number a equals 14.4.
3a = 14.4
The product of 2.2 and a number m is 13.2.
2.2(m) = 13.2