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lukranit [14]
4 years ago
8

Plot the points A(−2,−3) , B(−3,0) , C(3,2) , and D(4,−1) . What type of quadrilateral is ABCD ? Justify your answer using mid-p

oint, distance, slope and show your work for those you use.
Mathematics
1 answer:
Alika [10]4 years ago
6 0
Obtuse quadrilaateral. midpoint(-1,3) with slooe 1/2
distance 2
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What is the surface area of a cone having a slant height equal to 7.25 cm and radius equal to 3.5 cm?
Ksju [112]

Answer:

A≈118.2

Step-by-step explanation:

r= Radius= 3.5

l= Slant height= 7.25

A= πrl+πr2= π·3.5·7.25+π·3.52≈118.20242

7 0
3 years ago
A simple random sample of 85 is drawn from a normally distributed population, and the mean is found to be 146, with a standard d
MatroZZZ [7]

The correct option is ''The value of 135 because it is not greater than 136.5 values is outside the 99% confidence interval for the population mean''

<h2>Given that,</h2>

A simple random sample of 85 is drawn from a normally distributed population, and the mean is found to be 146, with a standard deviation of 34.

<h3>We have to find,</h3>

Which of the following values is outside the 99% confidence interval for the population mean?

<h3>According to the question,</h3>

A simple random sample of 85 is drawn from a normally distributed population, and the mean is found to be 146, with a standard deviation of 34.

Sample space n = 85,

Mean = 146

And standard deviation = 34

Then, The standard error of the sample is,

= \dfrac{\sigma}{n}\\\\= \dfrac{34}{\sqrt{85}}\\\\= \dfrac{34}{9.21}\\\\= 3.6

Then, z-critical value for 99% is 2.58,

Margin of error = ±9.515

Confidence interval for lower bound is,

= 146 - 9.515 = 136.485

And confidence interval upper bound is,

= 146 + 9.515 = 155.515

Here, 135 is less than the lower bound,

Therefore, 135 does not lie within a 99% confidence interval.

For more details about Lower bound refer to the link given below.

brainly.com/question/15974739

7 0
3 years ago
Read 2 more answers
Fill in the blanks. Please answer as shown in the boxes. Please fill out all boxes. Will mark brainiest if correct
jarptica [38.1K]

Answer:

(5x + 7y)² = 25x² + 70xy + 49y²

Step-by-step explanation:

(5x + 7y)² = 25x² + 70xy + 49y²

Because,

(5x + b)² = (5x)² + 2(5x)(b) + b²

2(5x)(b) = 70xy

b = 7y

b² = (7y)² = 49y²

6 0
4 years ago
This needs to be answered for a number line <br><br> -9=4x+3
Galina-37 [17]

Answer:

X=-3

Step-by-step explanation:

To find the unknown variable: X, we need to see how mich 4x equals to. to do this, we must first subtract 3 from both sides of the equation. The left side will be left with -12, and the right side will be left with 4x. This means:

-12=4x So...

x=-3

To check if this is right, you can subsitute this back into the equation.

4 times -3= -12. -12=3=-9

8 0
4 years ago
If the width of a rectangle is 3in less than the length, and the perimeter of the rectangle is 14in, find the length and width o
AlexFokin [52]
You can write equations for the length (l) and width (w) as
.. l -w = 3
.. 2(l +w) = 14

Divide the second equation by 2 and add the first equation.
.. (2(l +w))/2 +(l -w) = (14)/2 +3
.. 2l = 10
.. l = 5
Then
.. w = l -3 = 2

The length and width are 5 inches and 2 inches, respectively.
8 0
3 years ago
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