# How To Subtract Coordinates?

## How would you find the distance between two points if the line segment that connects them were horizontal?

A subtract the Y-coordinates of the points and take the absolute value B add the x-coordinates of the points and take absolute value C subtract the x-coordinates of the points and take the absolute value D add the Y-coordinates of the points and take the absolute value

C subtract the x-coordinates of the points and take the absolute value

just because it is a horizontal.

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free to e-mail if have a question

## Which of the following changes to the coordinates of the vertices of a figure would not change the dimensions?

A The x- and y-coordinates of the vertices are tripled. B The x-coordinates of the vertices are doubled. C Four is added to the x-coordinates of the vertices and three is subtracted from the y-coordinates of the vertices. D Three is added to the x-coordinates of the vertices and the y-coordinates of the vertices are halved.

If you add or subtract, that just moves the coordinates, but doesn't change the dimensions. However, anything that multiplies or divides the coordinates will *scale* the shape and change its dimensions:

A) --> tripling is a multiplying which will change the dimensions

B) --> doubling is also a multiplying

C) --> adding 4 and subtracting 3 will not affect the dimensions

D) --> adding 3 won't affect the horizontal dimension, but halving the y coordinates will affect the vertical.

Answer:

C Four is added to the x-coordinates of the vertices and three is subtracted from the y-coordinates of the vertices.

## How do I translate a graph 3 units to the left?

I think you add 3 units to all the y coordinates, then graph it, but it doesn't seem to be adding up (no pun intended). The new graph moved up, not to the left. Can somebody help me please?

Subtract three units from all the x coordinates. X coordinates deal with left and right, Y deals with up and down.

## Find the length of vectors?

Given P and Q have the coordinates of P(-3,4,-1) and Q(2,-6,5) , find: (i) the length of vector PQ (ii) the angle between the vector OP and OQ

This question is not too difficult:

You subtract the individual coordinates of Q, from the individual coordinates of P.

take each of those numbers and "square" each one.

Add them together --- and take the square root.

That gives you the unit length.:

P-Q:

Take the square root of : ((-3)- (2))^2 + ((4) - (-6))^2 + ((-1) - 5))^2

Length of vector = Sq Rt of: (-5)^2 + (10^2 + (-6)^2 = Square Root of 161

Length of Vector = 12.69

These websites should be helpful.

http://www.intmath.com/vectors/7-vectors-in-3d-space.php

http://en.wikipedia.org/wiki/Normed_vector_space

## Mayan Stones in Assassins Creed Black Flag?

I'm trying to get the Mayan outfit on AC4 and to do that I need all the Mayan stones. I have collected 13/16 but I can't find the other three any where. I could really use a hand in knowing where they are! Thanks in advance

Found this list about a month ago, I've only tried a few but it seems accurate

Note: Complete all 16 Mayan symbol puzzles to unlock the Mayan Outfit on Tulum (72, 404)

Symbol #1:

Island: Great Inagua

Map Coordinates: Story-related. Completed during DNA Sequence 4, Memory 1.

Symbol #2:

Island: Cat Island

Map Coordinates: 736, 692

Symbol #2:

Island: Mantanzas

Map Coordinates: 340, 643

Symbol #4:

Island: Cape Bonavista

Map Coordinates: 180, 594

Symbol #5:

Island: Tulum

Map Coordinates: 71, 402

Symbol #6:

Island: Pinos Isle

Map Coordinates: 337, 475

Symbol #7:

Island: Pinos Isle

Map Coordinates: 344, 476

Symbol #8:

Island: Tortuga

Map Coordinates: 875, 379

Symbol #9:

Island: Long Bay

Map Coordinates: 524, 255

Symbol #10:

Island: Isla Providencia

Map Coordinates: 503, 45

Symbol #11:

Island: Isla Providencia

Map Coordinates: 505, 43

Symbol #12:

Island: New Bone

Map Coordinates: 434, 113

Symbol #13:

Island: Misteriosa

Map Coordinates: 302, 120

Symbol #14:

Island: Misteriosa

Map Coordinates: 295, 197

Symbol #15:

Island: Santanillas

Map Coordinates: 214, 244

Symbol #16:

Island: Santanillas

Map Coordinates: 224, 243