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3 years ago

Slope of a line perpendicular to 5x -9y = 1

Mathematics

1 answer:

Oksana_A [137]3 years ago

8 0

I think it would be y=(-9/5)x -1/9

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Line 1: 3x+y=6 line 2: 3x-y=6 graph the system of equation below.

prisoha [69]

Answer:

y1×y2

x1×x2

y1-x1. y2+x2. do this then plot your points and it should solve your problem.

4 0

3 years ago

(6, - 3, 1) and (8,9,-11) find the angle between the vector

Svetllana [295]

Answer:

The angle between the two vectors is 84.813°.

Step-by-step explanation:

Statement is incomplete. Complete form is presented below:

<em>Let be (6,-3, 1) and (8, 9, -11) vector with same origin. Find the angle between the two vectors. </em>

Let $\vec u = \langle 6, -3, 1 \rangle$ and $\vec v = \langle 8,9,-11 \rangle$ , the angle between the two vectors is determined from definition of dot product:

$\theta = \cos^{-1} \left(\frac{\vec u \,\bullet \,\vec v}{\|\vec u\|\cdot \|\vec v\|} \right)$ (1)

Where:

$\vec u$ , $\vec v$ - Vectors.

$\|\vec u\|$ , $\|\vec v\|$ - Norms of each vector.

Note: The norm of a vector in rectangular form can be determined by either the Pythagorean Theorem or definition of Dot Product.

If we know that $\vec u = \langle 6,-3,1 \rangle$ and $\vec v = \langle 8, 9,-11 \rangle$ , then the angle between the two vectors is:

$\theta = \cos^{-1}\left[\frac{(6)\cdot (8) + (-3)\cdot (9) + (1)\cdot (-11)}{\sqrt{6^{2}+(-3)^{2}+1^{2}}\cdot \sqrt{8^{2}+9^{2}+(-11)^{2}}} \right]$

$\theta \approx 84.813^{\circ}$

The angle between the two vectors is 84.813°.

6 0

2 years ago

Will give brainliest to first correct answer

jeyben [28]

Answer:

A or C

Step-by-step explanation:

3 0

3 years ago

20. The perimeter of a square is 72 in. What is its area? 72 in2 324 in2 18 in2 5,184 in2

tatuchka [14]

To find the length of each side 72/4
Each side is 18

So area is 18 times 18= 324

6 0

3 years ago

The functions f(x) = (x + 1)2 − 2 and g(x) = -(x − 2)2 + 1 have been rewritten using the completing-the-square method. Is the ve

Ksenya-84 [330]

Answer:

The negative outside the parentheses indicates that the vertex is a maximum

f(x) has a minimum vertex

g(x) has a maximum

Step-by-step explanation:

7 0

3 years ago