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katen-ka-za [31]
1 year ago
6

Find the x-coordinate for the midpoint of AB if A(-3, 8) and B(-7,-6).

Mathematics
1 answer:
spayn [35]1 year ago
4 0

x =-5

------

1) Since the Formula of the Midpoint is:

2) So Let's plug it into the formula the values, for A, and B

3) So the x coordinate of the Midpoint is x =-5

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A sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's p
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Answer:

So the value of the test statistic is -0.85.

Step-by-step explanation:

We know that a sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 54% of the chips do not fail in the first 1000 hours of their use.

We get that:

n=1800\\\\p_1=53\%=0.53\\\\p_2=54\%=0.54\\

We calculate the standar deviation:

\sigma=\sqrt{\frac{0.53 \cdot (1-0.53)}{n}}=\sqrt{\frac{0.53 \cdot 0.47}{1800}}=0.01176

We calculate the value of the test statistic:

z=\frac{p_1-p_2}{\sigma}=\frac{0.53-0.54}{0.01176}=-0.85

So the value of the test statistic is -0.85.

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3 years ago
One kilometer is equal to 0.62 miles. Which best describes the relationship?
Alex_Xolod [135]
C. non linear this will be the answer
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2 years ago
A Line Segment has the points (1,-2), and (3,-2). What are the new points after its dilated by a scale factor of 3/2 or 1.5
jeka57 [31]

Answer:

The new points after dilation are

(3/2, -3) and (9/2,-3)

Step-by-step explanation:

Here in this question, we want to give the new points of the line segment after it is dilated by a particular scale factor.

What is needed to be done here is to multiply the coordinates of the given line segment by the given scale factor.

Let’s call the positions on the line segment A and B.

Thus we have;

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So by dilation, we multiply each of the specific data points by the scale factor and so we have;

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3 years ago
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Answer:

-2x- 13

Step-by-step explanation:

Hi there!

(4x - 5)-(6x + 8)

Open up the parentheses

4x - 5-6x - 8

Combine like terms

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I hope this helps!

6 0
3 years ago
Read 2 more answers
What is the equation of the line?
inessss [21]
The answer would be x=-9
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3 years ago
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