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Hitman42 [59]
3 years ago
6

Plsss help will give a good amount of points, need done asap

Mathematics
2 answers:
Alex3 years ago
7 0
4+2i because you can’t have a negative square root
maksim [4K]3 years ago
7 0

Answer:

4 + 2i

Step-by-step explanation:

Since

\sqrt{ - 1}  = i

4 +  \sqrt{ - 4}  = 4 +   \sqrt{ - 1 \times  {2}^{2} }  \\  = 4 +  2i

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A random sample of 38 wheel chair users were asked whether they preferred cushion type A or B, and 28 of them preferred type A w
-BARSIC- [3]

Answer:

The statement that cushion A is twice as popular as cushion B cannot be verified

Step-by-step explanation:

From the question we are told that:

Sample size n=38

Type a size A X_a=28

Type a size B X_b=10  

Generally the probability of choosing cushion A P(a) is mathematically given by

P(a)=\frac{28}{38}

P(a)=0.73

Generally the equation for A to be twice as popular as B is mathematically given by

P(b)+2P(b)=3P

Therefore Hypothesis

Null H_0: p \leq \frac{2P}{3P} \\Altenative H_A:p>\frac{2P}{3P}

Generally the equation normal approx of p value is mathematically given by

z=\frac{x-np_0-0.5}{\sqrt{np_0(1-p_0)} }

z=\frac{28-(38*2/3)_0-0.5}{\sqrt{38*2/3*1/3} }

z=0.75

Therefore from distribution table

Pvalue=1-\theta (0.75)

Pvalue=0.227

Therefore there is no sufficient evidence to disagree with  the Null hypothesis H_0

Therefore the statement that cushion A is twice as popular as cushion B cannot be verified

7 0
3 years ago
What linear function represents the line given by the point slope equation y+7= 2/3(x+6)?
Neko [114]

Answer:

the correct answer is the 3rd one

4 0
3 years ago
Read 2 more answers
Kiesha and her classmates wrote proportions for the reduction of a triangle. A larger and smaller triangle have corresponding he
MrMuchimi

Answer:

the 2nd one

Step-by-step explanation:

mecause its new=original

6 0
3 years ago
Read 2 more answers
What is the domain and range?
Pie

Answer:

Domain: {-6, -2, -1, 1, 3, 6}

Range: {-6, -2, -1, 0, 3}

Step-by-step explanation:

to find the domain of a function, you look at all the possible x-values. this means you look at all the points, and see what their x-values are.

for example, the first point on the left is at (-6, -1). this means that -6 is in the domain. continue doing this for all the points, and you get {-6, -2, -1, 1, 3, 6}

to find the range of a function, it's just like domain but with y-values.

for example, for the leftmost point, it's at (-6, -1) so -1 is part of the range. continuing this with all the points, you get {-6, -2, -1, 0, 3}

5 0
2 years ago
8x7+4-10SOMEONE HELP PLS AND THANK U:)
pychu [463]

Answer:

50

Step-by-step explanation:

7 0
3 years ago
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