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4 years ago

What is the result of the construction shown?

Mathematics

1 answer:

Tema [17]4 years ago

5 0

Answer:

Option C: Copying an angle

Step-by-step explanation:

Angle bisector is a line through an angle that will split that angle to 2 equal angles. Thus, option A is wrong as no angle is being split.

Copying an angle involves reproducing a particular angle in another construction. The image shows us that there is an attempt to reproduce the perpendicular angle of 90°. Thus, option B is correct.

Copying a line segment involves creating the exact size of line in another construction. The image doesn't depict that. Thus option C is wrong.

Perpendicular bisector is when we draw a perpendicular line through a horizontal one to divide it into 2 equal parts. This is not the case here. Thus, option D is wrong.

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The z-score associated with 95% is 1.96. If the sample mean is 200 and the standard deviation is 30, find the upper limit of the

ziro4ka [17]

Answer:

The upper limit of the 95% confidence interval is:

C.I_u = 200 + (58.8/ $\sqrt{n}$ )

Step-by-step explanation:

The formula is given as:

C.I = μ ± Z*σ/ $\sqrt{n}$

The upper limit => C.I_u = μ + Z*σ/ $\sqrt{n}$

The lower limit => C.I_l = μ - Z*σ/ $\sqrt{n}$

The sample size (n) is not stated in the question. Hence, we calculate the upper limit with respect to n.

The upper limit => C.I_u = 200 + 1.96*(30/ $\sqrt{n}$ )

= 200 + (1.96*30)/ $\sqrt{n}$

= 200 + 58.8/ $\sqrt{n}$

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3 years ago

Fill in the missing work and justification for step 2 when solving 3(x + 2) = 12.

Aleksandr-060686 [28]

Answer:

3x + 6 = 12; Distributive Property

Step-by-step explanation:

3(x + 2) = 12

3*x + 3*2 = 12
3x + 6 = 12

This is a distributive property

Correct choice is A

3 0

3 years ago

Felix joins a local recreation center to play basketball.The recreation center charges a $20 annual fee, plus an additional $15

Sav [38]

Answer:

11 months

Step-by-step explanation:

185 - 20 = 165

165 ÷ 15 = 11

8 0

2 years ago

HELP PLEASE ANSWER QUICKLY!

quester [9]

Answer:

3 twelths is your answer :)

8 0

3 years ago

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2/3y + 15 = 9 <br> What are the steps for this question

xenn [34]

Answer:

see below

Step-by-step explanation:

2/3y + 15 = 9

Subtract 15 from each side

2/3y + 15-15 = 9-15

2/3y = -6

Multiply each side by 3/2 to isolate y

3/2 * 2/3y = -6 *3/2

y = -9

4 0

3 years ago

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