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serious [3.7K]
2 years ago
9

What is the product of the complex numbers 3-4i3−4i3, minus, 4, i and -6+i−6+iminus, 6, plus, i, where i=\sqrt{-1}i= −1 ​ i, equ

als, square root of, minus, 1, end square root ?
Mathematics
1 answer:
Marta_Voda [28]2 years ago
5 0

Answer:

z_1\times z_2=-14+27i

Step-by-step explanation:

We are given that two complex numbers

z_1=3-4i

z_2=-6+i

We have to find the product of two complex numbers

z_1\times z_2=(3-4i)(-6+i)

z_1\times z_2=3(-6+i)-4i(-6+i)

z_1\times z_2=-18+3i+24i-4i^2

z_1\times z_2=-18+27i+4 (i^2=-1)

z_1\times z_2=-14+27i

Guest
2 years ago
where tf did u get the Z from?
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2 At Bea's Pet Shop, the number of dogs, d, is initially five less than twice the number of cats, c. If she decides to add three
forsale [732]

Let D be dogs and C be cats

<em>dogs, d, is initially five less than twice the number of cats, c</em>

D + 5 = 2C

<em>If she decides to add three more of each, the ratio  of cats to dogs will be</em>

D + 8 = 2C + 3

<em>Could Bea's Pet Shop initially have 15 cats and 20 dogs?</em>

Simply plug in the numbers

20 + 5 = 2(15)

This is clearly not true: 25 does not equal 30

<em />

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7 0
2 years ago
What is 4x-4y/2=x+2 in slope intercept form?
Alla [95]

Answer:

The equation would be y = 3/2x - 1

Step-by-step explanation:

To find the answer in slope-intercept form, simply solve for y.

4x-4y/2=x+2 ----> Subtract 4x from both sides

-4y/2=-3x+2 ----> Multiply both sides by 2

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3 0
2 years ago
Lacey's mom makes her a birthday cake in the shape of an "L" . Lacey loves frosting, so her mom covers the entire outside of the
nikitadnepr [17]

Answer:

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  Please have a look at the attached photo.

<em>Lacey's mom makes her a birthday cake in the shape of an "L" . Lacey loves frosting, so her mom covers the entire outside of the cake in frosting, even the bottom of the cake. </em>

<em>How much space does Lacey's mom cover in frosting? </em>

My answer:

As we know that the surface area of the the cake is made up of rectangles. The formula for find the area of a rectangle is A = lw

  • The area of rectangle ABCD: 4*2 = 8
  • The area of rectangle ADFE : 12*2 = 24
  • The area of rectangle TJVS : 4*2 = 8
  • The area of rectangle ESFV :9*2 = 18
  • The area of rectangle HTJG: 5*2 = 10
  • The area of rectangle CBHG: 2*8 = 16

The area of CDEVGJ = ABHTFS

= 4*12 + 4*5

= 68

So the total area is: 68 +68  +16+10+18+8+24+8 = 220

Hope it will find you well

8 0
2 years ago
Knowing that sin 30 = 1/2 what is a
natulia [17]

sin30^o=\frac{9}{a}\\\frac{9}{a}=\frac{1}{2}\\a=2\cdot9\\a=18

4 0
2 years ago
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ΔABC underwent a sequence of rigid transformations to give ΔA′B′C′. Which transformations might have taken place?
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Answer: The correct option is second, a rotation 90^{\circ} clockwise about the origin followed by a reflection across the x-axis.

Explanation:

From the given figure it is noticed that the vertices of ΔABC are A(-6,4), B(-4,6), C(-2,2) and vertices of ΔA'B'C' are A'(4,-6), B(6,-4), C(2,-2).

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If a shape is rotated 270^{\circ} clockwise about the origin then the  point P(x,y) will be P'(-y,x) and after that reflect across the x-axis, so the point after transformation will be P'(-y,-x), therefore it is not the correct option.

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4 0
2 years ago
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