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sergejj [24]
3 years ago
8

Which one is it .....

Mathematics
2 answers:
lisov135 [29]3 years ago
7 0

Answer:

D) n/3 - 7

Step-by-step explanation:

n/3 - 7

7 is subtracted (so it's behind) and the quotient (fraction) of n and 3

zubka84 [21]3 years ago
6 0

Answer:

D) n/3 - 7

Step-by-step explanation:

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How does the experimental probability of rolling a 3 compare with the theoretical probability of rolling a 3​
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Step-by-step explanation:i did the test and got it right

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If I'm twerking at 2000 miles an hour how many miles will my as s move. 9 inches per shake
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69

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2. Solve the equation.<br> (50 Points)<br> * =<br> + 9 = 30<br> Enter your math answer
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What product is positive ?​
s344n2d4d5 [400]
<h3>Answer: Choice D</h3>

=======================================================

Explanation:

The long way to do this is to multiply all the fractions out by hand, or use a calculator to make shorter work of this.

The shortest way is to simply count how many negative signs each expression has.

The rule is: if there are an even number of negative signs, then the product will be positive. Otherwise, the product is negative.

For choice A, we have 3 negative signs. The result (whatever number it is) is negative. Choice B is a similar story. Choice C is also negative because we have 1 negative sign. Choices A through C have an odd number of negative signs.

Only choice D has an even number of negative signs. The two negatives multiply to cancel to a positive. The negative is like undoing the positive. So two negatives just undo each other. This is why the multiplied version of choice D will be some positive number.

Or you can think of it as opposites. If you are looking up (positive direction) and say "do the opposite" then you must look down (negative direction). Then if you say "do the opposite", then you must look back up in the positive direction.

5 0
3 years ago
From a radar station, the angle of elevation of an approaching airplane is 32.5 degree. The horizontal distance between the plan
denis23 [38]

Answer: 42.21 km

Step-by-step explanation:

We can solve this using trigonometry, since we have the following data:

\theta=32.5\° is the the angle of elevation

d=35.6 km is the horizontal distance between the plane and the radar station

x is the hypotenuse of the right triangle formed between the radar station and the airplane

Now, the trigonometric function that will be used is <u>cosine</u>:

cos\theta=\frac{d}{x} because d is the adjacent side of the right triangle

cos(32.5\°)=\frac{35.6 km}{x}

Finding x:

x=\frac{35.6 km}{cos(32.5\°)}

x=42.21 km

4 0
3 years ago
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