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skad [1K]
2 years ago
14

Which alternative is the NEGATIVE reciprocal of -4?* A. - 4 B. -1/4 C. 1/4 D.4

Mathematics
1 answer:
kramer2 years ago
4 0
A. It’s asking for the negative, the reciprocal, is always the same number, just sometimes positive or negative, it would be A since it’s asking for the NEGATIVE reciprocal! Hope this helps.
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6 Paul runs 1.5 km on the bearing 127°. a Draw a diagram of the situation. b How far east is Paul from his starting point? ( How
GenaCL600 [577]

By running in a bearing of 127°, Paul motion is in the south eastern direction.

Correct responses:

a. Please find attached the required diagram created with MS Visio

b. Paul's distance travelled east is approximately 11.98 km

  • Paul's distance travelled south is approximately 0.903 km

<h3>Method used for diagram and for the distance calculation</h3>

Given:

The distance Paul runs = 1.5 km

The bearing Paul is running = 127°

a. The bearing of path Paul runs, 127°, is the angle measured in the clockwise direction relative to the northern direction

Please find attached the diagram representing the situation, created with MS Visio.

b. Paul's distance travelled east relative to the starting point is given by the component of Paul's path in the x-axis direction which is found as follows;

  • Paul's distance east =  15 km × cos(37°) ≈ <u>11.98 km</u>

Pau's distance travelled in the south direction relative to the starting point

is given by the vertical distance travelled relative to the x-axis, which is

given as follows;

Distance Paul travels south = 1.5 km × sin(37°) ≈ <u>0.903 km</u>

Learn more about bearings in trigonometry here:

brainly.com/question/23427938

5 0
2 years ago
A 90 percent confidence interval for the slope of a regression line is determined to be (-0.181, 1.529). Which of the following
GenaCL600 [577]

Answer: a. The correlation coefficient of the data is positive.

Step-by-step explanation:

Estimated slope of sample regression line  = \dfrac{Upper \ limit + lower\ limit}{2}

Here , confidence interval :  (-0.181, 1.529)

Estimated slope of sample regression line  = \dfrac{-0.181+1.529}{2}

=\dfrac{1.348}{2}\\\\=0.674\ \ \ \ [\text{ positive}]

⇒Correlation coefficient(r) must be positive, So a. is true.

But, d. and e. are wrong(0.674 ≠ 0 or 1.348).

We cannot check residuals or its sum from confidence interval of slope of a regression line, so b is wrong.

We cannot say that scatterplot is linear as we cannot determine it from interval, so c. is wrong

So, the correct option : a. The correlation coefficient of the data is positive.

7 0
3 years ago
Hey can anyone tell me how to do slope
netineya [11]
The main thing is rise/run. y=mx+b that is the formula for slope
7 0
2 years ago
Read 2 more answers
69 POINTS FOR THE BEST ANSWER EVER!! PLEASE HELP PRO'S are aloud!! :D<br><br><br> TYSM everyone
slava [35]
I would say a because it best fits 
5 0
3 years ago
Read 2 more answers
Which numbers are a distance of 6 units from 2 on the number line?
egoroff_w [7]

Answer:

The numbers are 8  and -4

The graph in the attached figure

Step-by-step explanation:

we know that

To find the first number, adds 6 units to the number 2 and to find the second number subtract 6 units from the number 2

Let

x-----> the first number

y-----> the second number

we have

x=2+6=8

y=2-6=-4

using a graphing tool

see the attached figure

5 0
3 years ago
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