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3 years ago

Find the mean of the data shown in the stem–and–leaf plot below. Round your answer to the nearest tenth.

Mathematics

1 answer:

forsale [732]3 years ago

8 0

Mean = (9.1 + 9.2 + 9.3 + 9.3 + 9.5 + 10.4 + 10.5 + 10.6 + 10.6 + 10.7 + 11.1 + 11.1 + 11.4 + 11.8 + 11.9 + 11.9 + 12.4 + 12.7 + 12.9)/19 = 196/19 = 10.3

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The midpoint of AB is M(1, -4). If the coordinates of A are (-3,-6), what are the coordinates of B?

kramer

Answer:

The coordinates of B is (5,-2)

Step-by-step explanation:

In order to find the coordinates of B, you have to use midpoint formula. Then substitute the following values into the formula :

$m = ( \frac{x1 + x2}{2} , \frac{y1 + y2}{2} )$

Let (x1,y1) be A (-3,-6),

Let (x2,y2) be B,

Let midpoint be M (1,-4),

$(1, - 4) = (\frac{ - 3 + x2}{2} , \frac{ - 6 + y2}{2} )$

$by \: comparison, \:$

$\frac{ - 3 + x2}{2} = 1$

$- 3 + x2 = 2$

$x2 = 5$

$\frac{ - 6 + y2}{2} = - 4$

$- 6 + y2 = - 8$

$y2 = - 2$

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3 years ago

Which ratio it's less then 7/9 I need help ASAP

diamong [38]

Answer:

7/9

Step-by-step explanation:

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3 years ago

When is it best to review your notes

sergey [27]

As soon as possible after the lecture

5 0

3 years ago

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Which function has a domain of all real numbers?

Aliun [14]

Answer:

Step-by-step explanation:

$( {2 x})^{ \frac{1}{3} } - 7 = \sqrt[3]{2x} - 7$

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2 years ago

the length of a rectangle is 9 inches less than twice the width. if the perimeter of the rectangle is 84 inches, find the dimens

Alexus [3.1K]

translate each statement into mathematical language

length is nine inches less than twice width. L = 2W - 9

perimeter is 84 inches 2L +2W = 84

Substitute the expression for L (2W-9) for L in the second equation resulting in the follwing

2(2W-9) + 2W = 84

4W - 18 + 2W = 84

(4W+2W) = 84+18

6W = 102

W = 102/6 = 51/3

L = 2(51/3) - 9

= L= 17-9

L=6

5 0

3 years ago