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dangina [55]
1 year ago
13

Are these lines parallel or not: L1: (1,2), (3,1), and L2: (0,-1), (2,0)

Mathematics
1 answer:
Phoenix [80]1 year ago
5 0

First find the slope of the first line

L1

m = ( y2-y1)/(x2-x1)

m = ( 1-2)/(3-1)

= -1/2

Now find the slope of the second line

L2

m= ( y2-y1)/(x2-x1)

= ( 0 - -1)/(2 -0)

= (0+1)/(2-0)

= 1/2

Parallel lines have the same slope

These lines do not have the same slope, they are different by a negative sign.

These lines are not parallel.

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2) translate (x,y)->(x-6,y+8)
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3) clockwise 90° rotation around (0,0), flip the x&y coordinates and then decide the signs they should have based on the quadrant they should be in
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Just two more thanks for all the help thus far
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Answer:

The answer can be calculated by doing the following steps;

Step-by-step explanation:

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Second, find out what 25% of $100 is. This is the amount of the sale discount. This is always found by mulitplying 0.250 by the item's cost $100, like this:

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This means, the cost of the item to you is

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Alternatively, you can think about it this way. The item is 25% off. This means you'll pay 75.000% of the total cost (100% - 25% = 75.000%).

Now what's 75.000% of the total cost?

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Just like the result above, the sale price on the item is $75.00.

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I would think it is round each amount to the nearest thousand dollars. 
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