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notka56 [123]
4 years ago
13

3a+5a+4a=?combine the like terms.

Mathematics
2 answers:
mezya [45]4 years ago
7 0
12a is your answer when you combine like terms. All you have to do is add all the numbers together with a variable of a to get your answer.
tia_tia [17]4 years ago
3 0
3a+5a+4a=12a

You add all of them together because they are all like terms.

Final Answer: 12a
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Answer:

The movie was 1 hour and 35 minutes long. (Or 95 minutes long)

Step-by-step explanation:

Well let's see:

It will take 15 minutes from the start to reach 5:00 PM

4:45+0:15=5:00

Now it will be 1 hour and 20 minutes from 5:00 PM to reach the end time of the movie.

Adding the minutes and hours together:

1 hour + 20 minutes + 15 minutes = 1 hour and 35 minutes

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During a 90-day monsoon season, daily rainfall can be modeled by sinusoidal functions. A low of 4 inches of rainfall was recorde
Phoenix [80]

Answer:

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Step-by-step explanation:

Let consider the following model:

c(t) = A \cdot \sin \left(\frac{2\pi \cdot t}{T}  \right) + \bar c

The average is given by the following formula:

\bar c = \frac{c_{min}+c_{max}}{2}

The maximum value is:

c_{max} = 2 \cdot \bar c - c_{min}

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c_{max} = 12\,in

Amplitude is:

A = 12\,in - 8\,in

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T = \frac{2\pi}{\frac{3}{2}\pi }\cdot (30)

T = 40

The complete expression is:

c(t) = 8\,in + 4\,in \cdot \sin \left(\frac{2\pi}{40}\cdot t  \right)

The times associated with c = 5\,in are, respectively:

8\,in + 4\,in \cdot \sin \left(\frac{2\pi}{40}\cdot t  \right) = 5\,in

4\,in \cdot \sin \left(\frac{2\pi}{40}\cdot t  \right) = -3\,in

\sin \left(\frac{2\pi}{40}\cdot t  \right) = -0.75

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Instants are, respectively:

t_{1} \approx 25.4\,days

t_{2} \approx 34.6\,days

Period is:

25.4\,days \leq t \leq 34.6\,days

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3 years ago
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