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Ivahew [28]
3 years ago
10

Which values of x and y would make the following expression represent a real number? (6 + 3i)(x + yi)

Mathematics
1 answer:
dexar [7]3 years ago
3 0

Answer:

C. x = 6, y = –3

Step-by-step explanation:

I just took the test and got it right :)

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I dont understand what I'm supposed to do
marissa [1.9K]

Your suppose to take the order pair you got and subsitute it in both of the equations. The chart has the y and x on one side and a number on the other. Treat it like an algebraic equation and try to see if when you subsitute the x and y with the order pair given you get the number on the other side of the equation. For example x + 3y = 6 once subsituted with the order pair looks like 3 + 3(1) = 6. From there you do one step at time until finally you get 6 = 6 which tells you that (3,1) is a solution for this equation. Now you have to find out if the ordered pair works for both of the equations not just one since it said "given system". Hope I explained it clearly enough :)  

5 0
3 years ago
1000(100+200-88)+22-4
krek1111 [17]

Answer:

212018

Step-by-step explanation:

that + that + that - that times that equals 212018

hope you understood


6 0
4 years ago
Read 2 more answers
Write this equation in Perfect Square form. y=x²+12x-8
Otrada [13]

Answer:

No

Step-by-step explanation:

I need to get this to 20 words and i feel bad but i am not doing this use a god dam calculater.. ok im at 20 words bye now

7 0
3 years ago
Help PLZZZZ I dont know this its confusing.
pishuonlain [190]

Answer:

c and b

Step-by-step explanation:

8 0
3 years ago
A cylindrical thermos has a radius of2 in. and is 5 in. high. It holds 10 f oz. To the nearest ounce, how many ounces will a sim
miv72 [106K]
Let
A--------> larger thermos with radius 3 in
B-------> smaller thermos with radius 2 in

we know that
scale factor=radius larger thermos/radius smaller thermos
scale factor=3/2----> 1.5

volume larger thermos=[scale factor]³*volume smaller thermos
volume larger thermos=[1.5]³*10 f oz-----> 3.375*10-----> 33.75 f oz----> 34 f oz

the answer is
 34 f oz

6 0
4 years ago
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