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4 years ago

Multiply the following complex numbers (4-6i)(6-8i)

Mathematics

2 answers:

Bad White [126]4 years ago

6 0

(4-6i)(6-8i)

24-32i-36i+48i²

24 + -68i - 48

-24-68i

iragen [17]4 years ago

4 0

4*6=24
4*(-8i)=-32i
-6i*6=-36i
-6i*(-8i)=(-6*-8)(i*i)=(48)(-1)=-48
(4-6i)(6-8i)=
-24-68i

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Is - 5/12 equivalent to 5/-12

Kamila [148]

Answer:

Yes

Step-by-step explanation:

-5/12 is the same as saying 5/-12

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3 years ago

Use the protractor to measure these angles: M<AJK = <br>m<BKU =<br> m<CLJ =

horsena [70]

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3 years ago

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You are graphing Square ABCDABCDA, B, C, D in the coordinate plane. The following are three of the vertices of the square: A(4,

Vsevolod [243]

Answer:

D(4,-3)

Step-by-step explanation:

Given three of the vertices of the square: A(4, -7), B(8, -7),C(8, -3)

Let the coordinate of the fourth vertex be D(x,y).

We know that diagonals of a square are perpendicular bisector. So, the midpoint of both diagonals is the same.

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Midpoint of BD = Midpoint of AC

$\left(\dfrac{8+x}{2},\dfrac{-7+y}{2}\right) =\left(\dfrac{4+8}{2},\dfrac{-7+(-3)}{2}\right)\\ \left(\dfrac{8+x}{2},\dfrac{y-7}{2}\right) =\left(\dfrac{12}{2},\dfrac{-10}{2}\right)\\ \left(\dfrac{8+x}{2},\dfrac{y-7}{2}\right) =\left(6,-5\right)\\$Therefore$:\\\dfrac{8+x}{2}=6\\8+x=12\\x=12-8\\x=4\\$Similarly$\\\dfrac{y-7}{2}=-5\\y-7=-5*2\\y-7=-10\\y=-10+7=-3$

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8 0

3 years ago

What is the answer to x? Help ASAP

Brut [27]

Answer:

Step-by-step explanation:

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3 years ago

a computer and printer a totoal cost $1132 the cost of the computer is three times the cost of the ptinter

zavuch27 [327]

Use a system of equations

C+P=1132
3P=C

Substitute C in first equation as
3P+P=1132
Simplify
4P=1132
Solve
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NOW SOLVE FOR C SUBSTITUTING P VALUE IN FIRST EQUATION

C+283=1132
C=1132-283
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2 years ago