3 years ago

By which matrix should you multiply vector [1 3] to rotate it 180°?

Mathematics

1 answer:

Ksivusya [100]3 years ago

4 0

Answer:

Step-by-step explanation:

Rotation 180° is accomplished by negating both the x- and y-coordinates. That is, you multiply each of them by -1. You want the opposite of the identity matrix, so matrix B.

You might be interested in

1. Laura was carrying all of the ice cream cups home when she

seropon [69]

I can tell you the answer if you can tell me how much she was carrying before she dropped nine of them

4 0

3 years ago

A rectangle is a _____. a. quadrilateral b. square c. parallelogram d. rhombus

Pavlova-9 [17]

Both A and C is true. However, even though a rectangle can be a parallelogram, a parallelogram is a quadrilateral, so the answer is A.
I hope this helps!

8 0

4 years ago

Solve the proportion ASAP do both promblem

lakkis [162]

8. 1/3 = 3/y

or, y= 9

11. 3/x= 6/x+8

or, 6x=3x+24

or, 3x= 24

or, x=8

Hope it helps uh.

6 0

3 years ago

Read 2 more answers

Pls help i am confused no links

Juliette [100K]

Answer:

x = 20

Step-by-step explanation:

These angles are equal to each other because they are vertical angles.

Hence, we can equal the two measurements together to solve for x:

3x + 50 = 6x - 10

3x + 60 = 6x

60 = 3x

20 = x

Check your work:

3(20) + 50 = 6(20) - 10

60 + 50 = 120 - 10

110 = 110

Correct

3 0

3 years ago

Solve the quadratic equation x2+8x−30=0 by completing the square.

diamong [38]

Answer:

$\bold{x=-4\pm\sqrt{46}}$

Step-by-step explanation:

$(a+b)^2=a^2+2ab+b^2\\\\\\x^2+8x-30=0\\\\\underbrace{x^2+2\cdot x\cdot 4+4^2}-4^2-30=0\\\\{}\qquad(x+4)^2\,-\,16-30=0\\\\{}\qquad\ \ (x+4)^2=46\\\\ {}\qquad\ \ x+4=\pm\sqrt{46}\\\\ {}\qquad\ \ x=-4\pm\sqrt{46}$

5 0

3 years ago