Which relation is not a function?A(2,9), (-1,-5), (1,5), (5,0), (12, 3)
B. (-3, 1), (6,2), (8,3), (6,4), (3, 5)
C. (5, 1), (4,2), (3, 3), (2, 4), (1,5)
D. (7,2), (5,3), (3, 4), (1,5),(-1, 6)

Answer:

13q

Step-by-step explanation:

q is the same as 1q

1q + 12q = 13q

Answer:

To determine whether AB and CD are parallel, perpendicular, or neither, we need to analyze their slopes.

The slope of a line passing through two points (x1, y1) and (x2, y2) can be calculated using the slope formula:

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

Let's calculate the slopes of AB and CD:

AB:

Point A (8, 4)

Point B (4, 3)

slope of AB = (3 - 4) / (4 - 8) = -1 / -4 = 1/4

CD:

Point C (4, -9)

Point D (2, -1)

slope of CD = (-1 - (-9)) / (2 - 4) = 8 / -2 = -4

Now, let's analyze the slopes:

1. If the slopes of AB and CD are equal, then the lines are parallel.

In this case, the slope of AB is 1/4 and the slope of CD is -4. Since the slopes are different, AB and CD are not parallel.

2. If the product of the slopes is -1, then the lines are perpendicular.

In this case, the product of the slopes of AB and CD is (1/4) * (-4) = -1. Since the product is -1, AB and CD are perpendicular.

Therefore, AB and CD are perpendicular to each other.

In summary, AB and CD are perpendicular lines.

Step-by-step explanation:

<3

To find the solution to the system of linear equations:

4x + 6y = 20

-5x + 7y = 62

We can use the method of substitution or elimination to solve for x and y. Let's use the elimination method:

1. Multiply the first equation by 5 and the second equation by 4 to eliminate the x variable:

20x + 30y = 100

-20x + 28y = 248

2. Add the two equations together:

(20x - 20x) + (30y + 28y) = 100 + 248

58y = 348

3. Divide both sides of the equation by 58:

y = 6

4. Substitute the value of y back into either of the original equations. Let's use the first equation:

4x + 6(6) = 20

4x + 36 = 20

4x = 20 - 36

4x = -16

x = -4

Therefore, the solution to the system of linear equations is:

(x, y) = (-4, 6)