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Over [174]
2 years ago
14

What is 2x - 4x = 1 as a fraction

Mathematics
2 answers:
kompoz [17]2 years ago
5 0
The answer is -1/2
So yeah
OleMash [197]2 years ago
4 0

Step-by-step explanation:

2x-4x=1

-2x=1

x=-1/2

<em>hope</em><em> </em><em>it</em><em> </em><em>helps</em><em> </em><em>you</em>

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Write 0.000739 in scientific notation.
jek_recluse [69]

Answer:

7.39 × 10-4^-4

Step-by-step explanation:

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3 years ago
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If angle c=60° , b=5 ,a=4 then find the value of the c ?​
Lyrx [107]

Answer:

c=sqrt21

Step-by-step explanation:

angle c is the angle between a and b, so use the cos law

c^2=a^2+b^2-2*a*b*cosC

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2 years ago
Differentiate with respect to x : 2xe^x​
Gnom [1K]

\\ \sf\longmapsto \dfrac{d}{dx}2xe^x

  • Apply product rule

\\ \sf\longmapsto \dfrac{d}{dx}2x(e^x)

\\ \sf\longmapsto 2x\dfrac{d}{dx}e^x+e^x\dfrac{d}{dx}2x

\\ \sf\longmapsto 2xe^x+2e^x

\\ \sf\longmapsto 2e^x(x+1)

7 0
2 years ago
What is the range, min, and max of the function f(x)=13-20x-x²-3x⁴
Naya [18.7K]

Answer:

  • range: (-∞, 29.4336]
  • min: -∞
  • max: 29.4336

Step-by-step explanation:

I found these using a graphing calculator. (See attached)

The function is a polynomial of 4th degree with a negative leading coefficient. (The coefficient of the 4th-degree term is -3.) Therefore, it opens downward and has a range that extends to -∞. This function only has one global maximum and no local minimum.

_____

The maximum can be found by solving the cubic equation that results from taking the derivative of this function and finding the root of that:

  df/dx = -12x^3 -2x -20 = 0

There are formulas for the solutions of a cubic, but the one negative real root of this cubic can be found easily with a graphing calculator using iteration:

  x ≈ -1.13879908894.

Dividing by -2, the above derivative function can be written as ...

  g(x) = 6x^3 +x +10

The one real zero of it can be found using Newton's Method iteration.

The Newton's Method iterator function is

  h(x) = x - g(x)/g'(x)

where g'(x) is the derivative of g(x), often available as a function on the graphing calculator.

The starting value for the iteration can be the x-value obtained from the graph: -1.139. It only takes about 2 or 3 iterations to find x to the precision of the calculator: x = h(h(x)). This x is the x-coordinate of the maximum, so f(x) is the maximum value: 29.4335546516.

__

The attachments show the function definitions and their use for finding the maximum of f(x) using a TI-84 calculator. Y₁ is the function f(x); Y₂ is its derivative, shown above as g(x). Y₃ is the iterating function, shown above as h(x). The nDeriv( ) function is a calculator function that finds the numerical derivative of its argument.

6 0
3 years ago
the cost to operate a certain aircraft is $255 per hour the algebraic expression 255t gives the total cost to operate the aircra
Temka [501]

Answer:

Total cost for 2.80 hours = ($255/hr)(2.80 hrs) = $714.

Step-by-step explanation:

Multiply this hourly rate by the elapsed time (2.80 hours):

Total cost for 2.80 hours = ($255/hr)(2.80 hrs) = $714.

3 0
2 years ago
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