Segment AB falls on line 2x − 4y = 8. Segment CD falls on line 4x + 2y = 8. What is true about segments AB and CD? They are perpendicular because they have the same slope of −2. They are perpendicular because they have slopes that are opposite reciprocals of −2 and one half. They are lines that lie exactly on top of one another because they have the same slope and the same y-intercept. They are lines that lie exactly on top of one another because they have the same slope and a different y-intercept

They are perpendicular because they have slopes that are opposite reciprocals of −2 and one half.

Step-by-step explanation:

This is because x = -2 and half of -2 is 1

when we use CD line and x2 we find 8x+4y=16 when added to 2x -4y=8 would equal 10x+4y = 2 1/2 xy = 16

When we use for AB line we see they are perpendicular 2 1/2 x 2 = 5 -4y = 8 shows y to be -2 and the 1/2 line leaves -2 1/2 and x also is 2 1/2.

They are perpendicular because they have slopes that are opposite reciprocals of −2 and one half.

Step-by-step explanation:

Let's solve each equation for y and put it in the y = mx + b form. Then m is the slope, and we can tell if the lines are parallel or perpendicular or neither.

2x - 4y = 8

-4y = -2x + 8

y = 1/2 x - 2; m = 1/2

4x + 2y = 8

2y = -4x + 8

y = -2x + 4; m = -2

Now that both equations are in the slope-intercept form, we see that the slopes are 1/2 and -2.

The slopes are opposite reciprocals, -2 and 1/2, so the lines are perpendicular.

They are perpendicular because they have slopes that are opposite reciprocals of −2 and one half.

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step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

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