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Rasek [7]
3 years ago
9

Which pair of complex factors results in a real number product? 15(–15i) 3i(1 – 3i) (8 + 20i)(–8 – 20i) (4 + 7i)(4 – 7i)

Mathematics
2 answers:
photoshop1234 [79]3 years ago
6 0

Answer:

(4 + 7i)(4 – 7i)

Step-by-step explanation:

This pair will produce a real answer because they are complex conjugates.

Complex conjugates ( a+bi) (a-bi)  when multiplied together form a real number ( a^2 + b^2)

I am Lyosha [343]3 years ago
6 0

Answer:

D. (4+7i)(4-7i)

Step-by-step explanation:

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What is 6,372.08 written in expanded form?
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3 years ago
What is the surface area of this composite figure?
andrew-mc [135]

Answer:

1260 inches squared

Step-by-step explanation:

Bottom: 24*6=144

Bottom front: 24*12=288

Bottom back: 24*12=288

Left side: 6*2=72

Right side: 6*12=72

Left top: 6*15=90

Right top: 6*15=90

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Top back: (24*9)/2=216/2=108

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6 0
3 years ago
.Which of the following represents the standard form of the linear equation below? x=13y+12
gtnhenbr [62]

Answer:

  B. 3x−y=36

Step-by-step explanation:

Multiplying the equation by 3 and subtracting the y-term gives you the desired form.

  x = 1/3·y +12

  3x = y + 36 . . . . . multiply by 3

  3x -y = 36 . . . . . . subtract y to get standard form

_____

Standard form has ...

  • only variable terms on the left side
  • a positive leading coefficient
  • only a constant on the right side
  • all coefficients mutually prime, integers where possible
  • variables in lexicographical order (optional, I'd say)
3 0
3 years ago
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