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3 years ago

Please help with this table

Mathematics

1 answer:

Lyrx [107]3 years ago

7 0

Answer:

Step-by-step explanation:

Mean = 8+12+10+6+14 = 50

50 divided by 5 = 10

(Divided by 5 because there are 5 numbers)

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Find the sum of (x+3) and (-x-4).

Rasek [7]

Answer:

-1 both x cancels out.....

4 0

3 years ago

Triangle RST has the vertices R(2, 3), S(-2, 1), and T(-1, 5). What are the coordinates after the two transformations: Reflectio

SCORPION-xisa [38]

Answer:

R''(2,-3), S''(-2,-1) and T'(-1,-5).

Step-by-step explanation:

The given vertices of triangle are R(2, 3), S(-2, 1), and T(-1, 5).

Reflection over the y-axis:

$(x,y)\to (-x,y)$

Using this rule, the vertices after reflection are

$R(2,3)\to R'(-2,3)$

$S(-2,1)\to S'(2,1)$

$T(-1,5)\to T'(1,5)$

Rotation at 180 degrees around the origin.

$(x,y)\to (-x,-y)$

Using this rule, the vertices after reflection are

$R'(-2,3)\to R''(2,-3)$

$S'(2,1)\to S''(-2,-1)$

$T'(1,5)\to T''(-1,-5)$

Therefore, the coordinates of vertices after the two transformations are R''(2,-3), S''(-2,-1) and T'(-1,-5).

7 0

4 years ago

Round 806,713 to the nearest thousand and 7,925,024 also 6,481,525

Bogdan [553]

806,713 = 807,000
7,925,024 = 7,925,000
6,481,525 = 6,482,000

5 0

3 years ago

Can i have some help

Leona [35]

Answer:

y = -1/3x

Step-by-step explanation:

The slope of that are perpendicular lines are negative opposites of each other. If a line has a slope of 3, then a line perpendicular to it will have a slope of (-(1/3)).

Use the equation of a line in point-slope form to solve this;

y = mx + b

where "m" is the slope and "b" is the y-intercept.

Substitute the slope in;

y = (-1/3)x + b

Since it passes through the origin, then it has no y-intercept, therefore the equation of the line is;

y = -1/3x

8 0

3 years ago

If a 12 sided regular polygon rotates about its center at which angle of rotation will the image of the polygon coinside with th

Amanda [17]

Answer: 30 degrees

This is the minimum amount of rotation.

Why this value? Well because 360/12 = 30

Consider a triangle with 3 sides. Specifically I mean an equilateral triangle. We can rotate it 120 degrees to have it line up with itself. Now notice that 360/3 = 120.

For a square, we can rotate it 90 degrees and we can say 360/4 = 90

So the general rule is that the minimum angle of rotation is 360/n, where n is the number of sides. This rule only works for regular polygons. Regular polygons have the same side length and the same angle measure (the side and angle measure won't necessarily be equal).

So going back to this 12 sided dodecagon, we have n = 12 and 360/n = 360/12 = 30 as the minimum angle of rotation. Each 30 degree rotation will have the polygon match up perfectly with its old image. The preimage and image will be identical.

6 0

3 years ago