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frutty [35]
3 years ago
5

PLEASE HELP ILL GIVE BRAINLIEST

Mathematics
1 answer:
Sergio039 [100]3 years ago
4 0

Answer:

Option (2)

Step-by-step explanation:

Given equation of a line → y = \frac{1}{2}x+3

Slope of the line 'm₁' = \frac{1}{2}

Let the equation of a line perpendicular to the given line is,

y = m₂x + b

Here, m₂ = Slope of the perpendicular line

b = y-intercept

By the property of perpendicular lines,

m₁ × m₂ = -1

Therefore, \frac{1}{2}\times m_{2}=-1

m₂ = -2

Equation of the perpendicular line will be,

y = -2x + b

Since the perpendicular line passes through a point (-3, 4)

4 = 6 + b

b = -2

Therefore, equation of the perpendicular line wiil be,

y = -2x - 2

Option (2) will be the answer.

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The answer is 6.7 :)
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f(x) = 3^x

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Read 2 more answers
A researcher has developed a new drug designed to reduce blood pressure. In an experiment, 21 subjects were assigned randomly to
Paladinen [302]

Answer:

Step-by-step explanation:

Hello!

The objective of the research is to compare the newly designed drug to reduce blood pressure with the standard drug to test if the new one is more effective.

Two randomly selected groups of subjects where determined, one took the standard drug (1- Control) and the second one took the new drug (2-New)

1. Control

X₁: Reduction of the blood pressure of a subject that took the standard drug.

n₁= 23

X[bar]= 18.52

S= 7.15

2. New

X₂: Reduction of the blood pressure of a subject that took the newly designed drug.

n₂= 21

X[bar]₂= 23.48

S₂= 8.01

The parameter of study is the difference between the two population means (no order is specified, I'll use New-Standard) μ₂ - μ₁

Assuming both variables have a normal distribution, there are two options to estimate the difference between the two means using a 95% CI.

1) The population variances are unknown and equal:

[(X[bar]₂-X[bar]₁)±t_{n_1+n_2-2;1-\alpha /2}*(Sa\sqrt{\frac{1}{n_1} +\frac{1}{n_2}  })]

t_{n_1+n_2-2;1-\alpha /2}= t_{23+21-2;1-0.025}= t_{42;0.975}= 2.018

Sa=\sqrt{\frac{(n_1-1)*S_1^2+(n_2-1)S_2^2}{n_1+n_2-2} } = \sqrt{\frac{22*7.15^2+20*8.01^2}{42} }= 7.57

[23.48-18.52]±2.018*(7.57*\sqrt{\frac{1}{21} +\frac{1}{23}  })]

[0.349; 9.571]

2) The population variables are unknown and different:

Welche's approximation:

[(X[bar]₂-X[bar]₁)±t_{Dfw;1-\alpha /2}*( \sqrt{\frac{S_1^2}{n_1} +\frac{S_2^2}{n_2} })]

Df_{w}= \frac{(\frac{S_1^2}{n_1} +\frac{S^2_2}{n_2} )^2}{\frac{(\frac{S_1^2}{n_1} )^2}{n_1-1}+ \frac{(\frac{S_2^2}{n_2} )^2}{n_2-1}  } =  \frac{(\frac{7.15^2}{23} +\frac{8.01^2_2}{21} )^2}{\frac{(\frac{7.15^2}{21} )^2}{20}+ \frac{(\frac{8.01^2}{23} )^2}{22}  } = 42.85= 42

t_{Df_w;1-\alpha /2}= t_{42; 0.975}=  2.018

[(23.48-18.52)±2.018\sqrt{\frac{7.15^2}{23} +\frac{8.01^2}{21} }]

[0.324; 9.596]

I hope this helps!

4 0
3 years ago
3. Which of the following is an example of a fixed
Zanzabum
Groceries because they are a necessity to people
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2 years ago
Can someone help me with the question in the image please i will mark as brainlyest if correct
nadya68 [22]

Answer:

a

Step-by-step explanation:

3 0
4 years ago
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