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PolarNik [594]
3 years ago
6

Find X when x equals negative 15

Mathematics
1 answer:
Ann [662]3 years ago
7 0
Judging by the question you have provided I came to the conclusion that you have already solved your own problem!

If the goal is to find X when X=-15 then your answer for X should be -15!

If this is not the entire equation please post the entire one! 

Hope this helped!
-Blake
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On the day a video was posted online, 5 people watched the video. The next day, the number of viewers have doubled. This trend c
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2v+5

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Step-by-step explanation:

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A $60.00 pair of shows is discounted 25% and then marked up 25%
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Anybody know the right answer?
Dmitry_Shevchenko [17]

If we just have

y = \cos x

that's an amplitude of 1 and a period of 2\pi

Let's modify this step by step.

Amplitude of 4. Four times the amplitude means a factor of 4 on the outside.

y = 4 \cos x

Period of π. Double the period means a factor of 2 on the inside.

y = 4 \cos(2x)

Horizontal shift of π/2 to the left. To the left means adding a positive number to x. The question appear ambiguous. It's not clear to me if we add to x or 2x; let's make it

y = 4 \cos(2(x + \frac \pi 2))

Vertical shift of 3:

y = 3 + 4 \cos(2(x + \frac \pi 2))

y = 3 + 4 \cos(2x +  \pi)

Depending on the interpretation of the phase shift, that pi may be a pi/2.

Answer: 3 + 4 \cos(2x +  \pi)

4 0
3 years ago
Find the slope of the line through the given points (4,-2),(-1,8)
nikklg [1K]

Answer:

\displaystyle m=-2

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Algebra I</u>

  • Coordinates (x, y)
  • Slope Formula: \displaystyle m=\frac{y_2-y_1}{x_2-x_1}

Step-by-step explanation:

<u>Step 1: Define</u>

Point (4, -2)

Point (-1, 8)

<u>Step 2: Find slope </u><em><u>m</u></em>

Simply plug in the 2 coordinates into the slope formula to find slope <em>m</em>

  1. Substitute in points [Slope Formula]:                                                             \displaystyle m=\frac{8+2}{-1-4}
  2. [Fraction] Add/Subtract:                                                                                  \displaystyle m=\frac{10}{-5}
  3. [Fraction] Divide:                                                                                                 \displaystyle m=-2<em><u> </u></em>
3 0
3 years ago
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