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3 years ago

Multiply the complex numbers: (3 + 2i)(3 - 2i)

Mathematics

2 answers:

den301095 [7]3 years ago

6 0

Answer:13

Step-by-step explanation:9-6i+6i+4

stealth61 [152]3 years ago

3 0

Answer: 13

Step-by-step explanation:

Multiply 3*3 get 9

Multiply 2*2 get 4

Add 9+4 and get 13

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How do you multiply (2r^2 5r-1)(5r^2 2r-8)?

cluponka [151]

Go on math papa 100r^(6)-90r^(3)+8

4 0

3 years ago

Rashid needs to by someone to build a box he must calculate the surface area of the box. How much wood does he need to buy

mojhsa [17]

Answer:

42 square feet

Step-by-step explanation:

SA=2lw+2lh+2wh

SA=2*3*3+2*3*2+2*3*2

SA=2*9+2*6+2*6

SA=18+12+12

SA=30+12

SA=42

Thus,

Rashid needs 42 square feet of wood to build a box

4 0

4 years ago

The price of an item has been reduced by 85% the original price was $95 what is the price of the item

Yanka [14]

Answer:

14.25

Step-by-step explanation:

95 x 0.85 = 80.75

95-80.75 = 14.25

3 0

3 years ago

find the slope and the y-intercept of the graph of the linear equation.y=-7x+2A)slope:-1/7;y-intercept:2B)slope:1/2;y-intercept:

mash [69]

If the equation of the line is y = -7x + 2

The general equation of a line is y = mx +c

where

c= y-intercept

and

m = slope

Hence comparing both equations

m = -7

and

c = 2

so slope = -7 and y-intercept = 2 option C

5 0

1 year ago

if my cost price is $6300 and my selling price is $5000 then what would be my gain and gain percentage?

guajiro [1.7K]

Given :-

CP = $6300
SP = $5000

To Find :-

The gain and gain % .

Solution :-

Well there is no gain as you can see the CP > SP .So there is a loss . We can find the loss and loss% . As ,

$\longrightarrow$ Loss = CP - SP

$\longrightarrow$ Loss = $(6300-5000)= $1300

Now the loss% is ,

$\longrightarrow$ Loss% = Loss/CP * 100

$\longrightarrow$ Loss% = $1,300/$6300*100

$\longrightarrow$ Loss% = 13/63 * 100

$\longrightarrow$ Loss% = 20.63%

Hence the loss is $1300 and the loss% is 20.63%.

7 0

3 years ago

Read 2 more answers