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Alex_Xolod [135]
3 years ago
10

(5 - i)(5 + I)= Answer choices: 26 25i 24

Mathematics
1 answer:
astra-53 [7]3 years ago
8 0

Answer:

26

Step-by-step explanation:

We can use difference of squares:

(5 - i)(5 +  i) = 5^2 - i^2

i^2 = -1, so we have 25 - (-1) = 25 + 1 = 26

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ipn [44]

Answer:

c. 6√2

Step-by-step explanation:

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5 0
3 years ago
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A cylindrical pressure has a height of 9 feet and diameter of 6 feet. How much gas can the pressure vessel hold when full?
AleksAgata [21]

Answer:

81π ft³

Step-by-step explanation:

If the diameter is 6 ft, the radius is 3 ft.  

The volume is V = (area of base)(height).

Here,                V = (π[3 ft]²)(9 ft) = 81π ft³

3 0
3 years ago
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Find the derivative of f(x) = 8x^2 + 11x at x = 7.
sleet_krkn [62]
Thank you for posting your question here at brainly. Feel free to ask more questions.  

f′(x)=2∗(8x(2−1))+1∗11x(1−1)

which is

f′(x)=16x+11

then let x = 7 gives us

f′(7)=123

      <span>
<span>Hope my answer would be a great help for you. </span> </span>  

<span> </span>

6 0
3 years ago
You have a 32-foot fence around a square garden. You paint 1/3 of one side of the fence. What fraction of the fence did you pain
dmitriy555 [2]
The answer is 1/12.

The perimeter of a square garden with side s is:
P = 4s

s = 1/4P

Since it is painted 1/3 of 1/4 of the fence, the<span> fraction of the painted fence is:
1/3 * 1/4 = 1/12</span>
8 0
3 years ago
Need help with all questions.
agasfer [191]
Im in your class at school im kayla
8 0
3 years ago
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