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siniylev [52]
3 years ago
10

I^2+1= Answer choices: 1-i 1+i 0 2

Mathematics
1 answer:
Sholpan [36]3 years ago
3 0

Answer:

0

Step-by-step explanation:

i^2+1

We know that i^2 = -1

-1 +1

0

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The thickness of eight pads designed for use in aircraft engine mounts are measured. The results, in mm, are 41.8, 40.9, 42.1, 4
nika2105 [10]

Answer:

We accept H₀ we don´t have enough evidence to support that the mean thickness is greater than 41 mm

Step-by-step explanation:

Sample Information:

Results:

41.8

40.9

42.1

41.2

40.5

41.1

42.6

40.6

From the table we get:

sample mean :  x  =  41.35

sample standard deviation    s = 0.698

Hypothesis Test:

Null Hypothesis                    H₀                x = 41

Alternative Hypothesis        Hₐ                x > 41

The test is a one-tail test

If significance level is  0.01 and n = 8  we need to use t-student distribution

From t-table  α = 0.01  and degree of freedom  df = n - 1  df = 8 - 1

df = 7    t(c) = 2.998

To calculate t(s)  =  (  x  -  41 ) / s/√n

t(s)  =  (  41.35  -  41 ) / 0.698/√8

t(s)  = 0.35 * 2.83/ 0.698

t(s) = 1.419

Comparing   t(s)  and t(c)

t(s) < t(c)

t(s) is in the acceptance region we accept H₀

7 0
3 years ago
X cubed = 64/27 A= ±8/3 B= 8/3 C= ±4/3 D= 4/3
Digiron [165]

Answer:

D

Step-by-step explanation:

x³ = 64/27

Take the cube root of both sides.

x = ∛(64/27)

Distribute the cube root to the numerator and denominator.

x = (∛64)/(∛27)

Take the cube root of the terms.

x = 4/3

5 0
3 years ago
Welp !!!!!!!!!!!!!!!!!!
iren [92.7K]
It is <span>B</span>. All u have to do is -2a/b which is 2 then plug 2 in and you get (2,1)
3 0
3 years ago
Read 2 more answers
For Exercises 19-28, find the angle measures. Use the diagram of the
andreev551 [17]

Answer:Side lengths: 2cm, 3cm, 4cm ... or you. F5. Angle measures: 30, 60, 90. SE. Isosceles. D6. Angle measures: 20: ... Use the diagram of the ... LJVK and Z KVL are called adjacent angles because they have a common vertex and a common side.

Step-by-step explanation:

5 0
3 years ago
(x+2/3)=(2x-4/2)<br> what is x equal to?
Nookie1986 [14]
X + 2/3 = 2x - 4/2
2/3 + 4/2 = 2x - x
2 + 2/3 = x
8/3 = x

I hope this helps!
7 0
2 years ago
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