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sweet-ann [11.9K]
3 years ago
9

Simplify the expression fraction with numerator of the square root of negative four and denominator of the quantity three plus i

minus the quantity two plus three times i. quantity eight plus two times i divided by seventeen quantity negative four plus two times i divided by five quantity four plus ten times I divided by twenty nine quantity eight plus ten times I divided by forty one
Mathematics
2 answers:
Kipish [7]3 years ago
3 0
Does it look like this: \frac{ \sqrt{-4} }{(3+i)-(2+3i)} =  \frac{-2i}{1-2i} or \frac{2i}{2i-1}

Do you need the others?
\frac{-4+2i}{-5} =  \frac{4-2i}{5}
Gre4nikov [31]3 years ago
3 0

Answer:

\frac{-4+2i}{5}  

Step-by-step explanation:

\frac{\sqrt{-4}}{(3+i)-(2+3i)}

simplify the denominator

\frac{\sqrt{-4}}{1-2i}

square root (-4) is +2i , because the value of square root (-1) is 'i'

\frac{+2i}{1-2i}                    

multiply top and bottom by its conjugate 1+2i

\frac{2i(1+2i)}{(1-2i)(1+2i)}  

\frac{2i+4i^2}{1+2i-2i-4i^2}  

The value of i^2 =-1

\frac{2i+4(-1)}{1+2i-2i-4(-1)}  

\frac{2i-4}{5}  

\frac{-4+2i}{5}  




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butalik [34]
4x = 3y - 8
 4         4
  x = ³/₄y - 2

                  -16x + 4y = 32
       -16(³/₄y - 2) + 4y = 32
-16(³/₄y) + 16(2) + 4y = 32
          -12y + 32 + 4y = 32
          -12y + 4y + 32 = 32
                    -8y + 32 = 32
                           - 32  - 32
                            -8y = 0
                             -8    -8
                               y = 0
x = ³/₄y - 2
x = ³/₄(0) - 2
x = 0 - 2
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6 0
3 years ago
Sean wrote the equation 9.25 = 5m, where m is the cost per pound, to show the relationship between the total cost, $9.25, and th
OLEGan [10]
<h2>Explanation:</h2>

The complete question is in a comment above. The statements says that:

  • Sean wrote the equation 9.25=5m
  • m is the cost per pound.
  • The equation show the relationships between the total cost, $9.25, and the number of pounds of pears.

So we are asked to write an write an equation to show the cost y of x pounds of pears. In other words, we need to write an equation such that y is given in terms of x, where x is the pounds of pears. So:

y=f(x)

From the equation we can determine m as:

m=\frac{9.25}{5}=1.85

So each pound costs $1.85. The equation tells us that 5 pounds of pears result costs $9.25. Then, by proportion:

\frac{y}{x}=\frac{9.25}{5} \\ \\ y=1.85x

So choosing the number of pounds as 0, 1, 2, 3, 4, 5, the table would be:

\begin{array}{cc}x(\text{Number of pounds}) & y(\text{Cost in dollars})\\0 & 0\\1 & 1.85\\2 & 3.7\\3 & 5.55\\4 & 7.4\\5 & 9.25\end{array}

From the table we can know that the graph is a line. that passes through all these points. Since this line passes through the origin, then y varies directly as x (Direct Proportion).

3 0
3 years ago
Does anyone know how to do this (algebra 2)
Ksivusya [100]
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5 0
2 years ago
The value of y varies directly with x, and y= -10 when x=40. Identify the value of y when x=-5
scoray [572]

Answer:

y = 1.25

Step-by-step explanation:

Use the direct variation equation y = kx, and solve for k:

y = kx

-10 = k(40)

-0.25 = k

So, the equation is y = -0.25x. Solve for y when x = -5

y = -0.25x

y = -0.25(-5)

y = 1.25

So, y = 1.25 when x = -5

8 0
3 years ago
6
Dominik [7]

Answer:

1140

Step-by-step explanation:

A decagon has 10 sides so substitute it like this:

(n-2) x 180

(10-2) x 180

8 x 180= 1140

6 0
2 years ago
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