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damaskus [11]
3 years ago
5

What is the best method of finding an accurate solution to a system of linear equations.

Mathematics
1 answer:
Mrac [35]3 years ago
8 0

Answer:

Using the eliminiation method or the substitution method.

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Element X is a radioactive isotope such that every 61 years, its mass decreases by half. Given that the initial mass of a sample
Sever21 [200]

Answer:

27.3

Step-by-step explanation:

y=a(1/2)^t/h

Plug in

22=30(1/2)^t/61

Divide both sides by 30

0.7333333333=(1/2)^t/61

Log both

Log(0.7333333333) / Log(1/2)

0.447458977 = t/61

0.447458977 x 61 = t

27.2949976 to the nearest tenth is 27.3 = t

7 0
3 years ago
Factor 2m2 - m - 21​
maks197457 [2]

Answer:

<h2>(2m-7)(m+3)</h2>

Step-by-step explanation:

hello:

2m² - m - 21​

∆ =b²-4ac    a=2  and  b= -1   and  c= -21

∆ =(-1)²-4(2)(-21)=169 = 13²

m1 = (-b+√∆)/2a = (1+13)4 = 14/4 = 7/2

m2 = (-b-√∆)/2a = (1-13)4 = -12/4 = -3

the factorization is : a(m-m1)(m-m2)

2(m-7/2)(m+3) = (2m-7)(m+3)

7 0
4 years ago
Match each function with the expression representing Its Inverse function.
USPshnik [31]

Answer:

Step-by-step explanation:

1). g(x) = -0.5x

   Equation form of the given function is,

   y = -0.5x

 Interchange x and y,

  x = -0.5y

  Solve for y,

  y = -\frac{x}{0.5}

  y = -2x

  Inverse function will be,

  g^{-1}x=-2x

2). h(x) = 4x

   Equation form of the function will be,

   y = 4x

   Interchange x and y,

   x = 4y

   Solve for y,

   y = \frac{x}{4}

   Inverse function will be,

   h^{-1}(x)=0.25x

3). y = x - 4

    Interchange x and y,

    x = y - 4

    Solve for y,

    y = x + 4

    Therefore, inverse of the linear equation is,

    y = x + 4

4). f(x) = \frac{x}{2}

    Equation form of the function will be,

    y = \frac{x}{2}= x

     Interchange x and y,  

     x = \frac{y}{2}

    Solve for y,

     y = 2x

     Therefore, inverse function will be,

     f^{-1}(x)=2x

5). k(x) = x

     Equation form of the function will be,

     y = x

     Interchange x and y,

     x = y

     Solve for y,

     y = x

     Inverse of the function 'f' will be,

     k^{-1}(x) =x

6). p(x) = x + 4

     Equation form of the function will be,

     y = x + 4

     Interchange x and y,

     x = y + 4

     Solve for y,

     y = x - 4

     Inverse of the function 'p' will be,

     p^{-1}(x)=x - 4

7 0
3 years ago
Which of the following functions is graphed below?
Alexxx [7]

Answer:

D is the correct answer

Step-by-step explanation:

3 0
3 years ago
1 7<br><br>_ + _ <br><br>6 10<br><br><br><br>Ayuda por favor
Taya2010 [7]

Answer: no entiendo la estructura de la operacion

Step-by-step explanation:

5 0
2 years ago
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