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Ksju [112]
2 years ago
5

Please help me answer all parts of the question in the photo.

Mathematics
1 answer:
goldenfox [79]2 years ago
3 0
z_1=4+2i\\z_2=-1+2i\\\overline(z_2)=\sqrt{(-1)^2+(2i)^2}=\sqrt{1-4}=i\sqrt{3}\\ z_1+\overline(z_1)=4+2i+\sqrt{4^2+(2i)^2}=4+2i+\sqrt{16-4}=4+\sqrt{12}+2i\\z_2+\overline(z_2)=-1+2i+\sqrt{(-1)^2+(2i)^2}=-1+2i+\sqrt{1-4}=-1+(2+\sqrt{3})i
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For what values of x is rational expression below undefined x-7/x^2-7x-8
Novay_Z [31]
The values are x = 8 and x = -1.

To find the undefined values, we need to know when the denominator is zero.
To do this, we need to factor it and find the value that would make either factor equal to zero.

If factors to: (x - 8)(x + 1)

Therefore, the undefined values would be at 8 and -1.
8 0
3 years ago
If the sales tax rate is 6%, find the tax on a $429.95 television to the nearest cent.
dexar [7]

Answer:

25.800

Step-by-step explanation:

6 persecnt of 429.95 is 25.800 rounded if you need it where i subtract it from the total its 404.150 or 404.15

8 0
2 years ago
What is the probability that no 1s will be in the output for an input sequence of 10 digits??
emmasim [6.3K]
The total numbers with 10 digits are 9*10*10*10*10*10*10*10*10*10 = 9*(10^9)

If you are restricted to use no 1s, the numbers are 8*(9^9)

Then, the probability is : numbers with no 1s /  total numbers

 = 8*(9^9) / [9*(10^9)]= 0.344
5 0
3 years ago
Samaria attached 165 inches of fringe material to a tablecloth if the tablecloth was in a shape of a regular pentagon how much f
Y_Kistochka [10]
35 in. because a pentagon has 5 sides and have to divide the total amount of yarn to the sides. 
4 0
2 years ago
Please explain the ans step by step 26 points !
eduard

Answer:

76ft^2

Step-by-step explanation:

do 18xpi to get the area

you get 57

it says every 3 cm is four ft so divide 57 by 3

you get 19 thats how many 4ft there are

then do 19x4 because thats how much each 3cm is in ft

you get 76

and since its area its ft^2

4 0
3 years ago
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