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Ede4ka [16]
4 years ago
11

Differentiate between:1.Crest and trough.2. Infrasound and ultrasound.​

Mathematics
1 answer:
Vinil7 [7]4 years ago
5 0

Answer:

A crest is the highest point of a wave.

A trough is the lowest point of a wave.

Infrasound is sound below the limit that humans can hear, below 20 Hz.

Ultrasound is sound above the limit that humans can hear, above 20,000 Hz.

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Write the equations of the following two sequences in "first term" form
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Which of the following is the correct answer after multiplying both sides of the inequality -x > -3 by -1?
Drupady [299]

Answer:

x < 3

Step-by-step explanation:

When you multipy an inequality by a negative, remember to switch the inequality sign!

-x > -3

(-x)(-1) > (-3)(-1)

x < 3

please give thanks and hit the heart button :)

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3 years ago
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Marking as brainliest!!!!
7nadin3 [17]

Answer:

The answer to your question is: Letter A

Step-by-step explanation:

Data

M (-6, 7)

E (4, 11)

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Formula

x = \frac{x1 + rx2}{1 + r}

y = \frac{y1 + ry2}{1 + r}

x = \frac{-6 + (1/3)(11)}{(4/3)} = \frac{-6 + (4/3)}{(4/3)}  = \frac{-18 + 4}{4} = \frac{-14}{4}  = \frac{-7}{2}

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5 0
3 years ago
What is the answer to -3/4 (2)(-6) in fraction form
nasty-shy [4]

I'm assuming the question looks like this?

\frac{-3}{4} (2)(-6)

If so then the answer should be:

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Hope this helps!

4 0
3 years ago
Roman stands across from a flag pole.
tigry1 [53]
We have been given a right angled triangle, hypotenuse is known, and angle has been given. we need to find the adjacent side to the angle.

we use trigonometry ratios.
the ratio where we relate the hypotenuse and adjacent side is the cosine.
cos θ = adjacent side / hypotenuse 
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adjacent side - x
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cos 39° = x / 17
cos 39° = 0.77
0.7771 = x/17
x = 0.7771 x 17
x = 13.21 m
distance from Roman's feet to the base of the pole is 13.21 
6 0
3 years ago
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