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2 years ago

Can someone please help with 6 a, b, c

Mathematics

1 answer:

vladimir1956 [14]2 years ago

7 0

Answer:

the answers may be wrong. But I have tried with the knowledge I have. So please do comment if the answer is wrong

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A share of stocks gained 12 points, then lost 114 points, and then gained 218 points. Find the overall change in its value.

VLD [36.1K]

Answer:

The overall change is 116points gained

Step-by-step explanation:

Points gained = 12points

Points lost = 114points

Points gained = 218points

Unknown:

Overall change in its value = ?

Solution:

The overall change = Total points gained - Total points lost

= (218 + 12) - 114

= 116points

The overall change is 116points gained

7 0

3 years ago

What's the distance between (0,2) and (0,8)?

N76 [4]

Answer:

6 units

Step-by-step explanation:

The distance between two points can be calculated with the formula

$\boxed{\textcolor{steelblue}{\text{Distance between 2 points}= \sqrt{(y_1 - y_2)^{2} + (x_1 - x_2)^{2} } }}$

However, since (0, 2) and (0, 8) have the same x coordinate of 0, the distance between them is the difference in their y-coordinates.

Distance between (0, 2) and (0, 8)

= 8 -2

= 6 units

7 0

2 years ago

A realtor collects the data set given in DS 12.2.4 concerning the sizes of a random selection of newly constructed houses in a c

Yuliya22 [10]

The table is missing in the question. The table is attached below.

Solution :

Let X = appraised value

Y = area (square feet)

The regression line is given by :

$\hat y = b_0+b_1X$

$b_1=\frac{n\sum XY-\sum X \sum Y}{n \sum X^2-(\sum X)^2}$

$=\frac{15(5964990)-(2157)(33370)}{15(404799)-(2157)^2}$

$=12.3267$

$b_0=\frac{\sum Y}{n}-b_1\frac{\sum X}{n}$

$=\frac{33370}{15}-\left(12.3267 \times \frac{2157}{15}\right)$

$b_0=452.0841$

The regression line is :

$\hat Y = 452.0841+12.3267 X$

To estimate the error variance, we have:

Error variance, $\sigma =\sqrt{\frac{\sum (Y-\hat Y)^2}n-2{}}$

$=\sqrt{\frac{587682.3}{15-2}}$

$=212.6178$

8 0

3 years ago

Legs and hypotenuse

zaharov [31]

Answer:

Step-by-step explanation:

For a right triangle, the side that is opposite of the right angle is called the hypotenuse. This side will always be the longest side of the right triangle. The other two (shorter) sides are called legs.

3 0

3 years ago

Add the following matrices.

aksik [14]

Answer:

[7 6]

[7 4]

Step-by-step explanation:

4 0

2 years ago

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