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2 years ago

Combine the like terms to create an equivalent expression:2r+1+(−4r)+7

Mathematics

1 answer:

STatiana [176]2 years ago

3 0

Answer:

2r+1+(-4r)+7

= -2r+8

= -2(r+4)

Step-by-step explanation:

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Match the parametric equations with the verbal descriptions of the surfaces by putting the letter of the verbal description to t

alukav5142 [94]

Answer:

1. B

2. C

3. A

4. D

Step-by-step explanation:

The parametric equations of the circular cylinder are:

$x(u,v)=a\cos v\\y(u,v)=a\sin v\\z(u,v)=u$

If the orientation of the cylinder is changed to have the height $u$ along the x-axis, the parametric equations of the cylinder match:

$3. \mathbf{r} \left( u, v \right) = u \mathbf{i} + \cos v \mathbf{j} + \sin v \mathbf{k}$

The parametric equations of the circular paraboloid are:

$x(u,v)=u\cos v\\y(u,v)=u\sin v\\z(u,v)=u^2$

Using the units vectors the parametric equations match:

$1. \mathbf{r} \left( u, v \right) = u \cos v \mathbf{i} + u \sin v \mathbf{j} + u^{2} \mathbf{k}$

The parametric equations of the cone are:

$x(u,v)=au\cos v\\y(u,v)=au\sin v\\z(u,v)=u$

Using the units vectors and rotating the base of the cone from $z=0$ to $x=0$ the parametric equations match:

$2. \mathbf{r} \left( u, v \right) = u \mathbf{i} + u \cos v \mathbf{j} + u \sin v \mathbf{k}$

The equation left is the equation of a plane:

$4. \mathbf{r} \left( u, v \right) = u \mathbf{i} + v \mathbf{j} + \left( 2u - 3v \right) \mathbf{k}$

5 0

3 years ago

11 El prisma tiene 9 caras, 9 aristas y 6 vertices. (2 puntos) Cierto Falso 1

Levart [38]

Hi! I don’t know what any of this means but I hope you have an amazing day and I hope god/allah/etc. blesses you :)
sorry I couldn’t answer

4 0

3 years ago

I need help plz 8th math

Lemur [1.5K]

Answer:

56°

Step-by-step explanation:

hii!

to solve this, we need to know that the angles of a triangle all add up to 180 degrees.

we are going to make an x equation here.

2x+3x+40=180

5x+40=180

-40 -40

5x=140

/5 /5

x=28

angle a is 2x, so the answer would be 28*2 which is 56°

hope this helped out :)

8 0

3 years ago

Read 2 more answers

For the function f(x) = 2x +3, evaluate f(3).

AveGali [126]

Answer:

Step-by-step explanation:

f(3) = 2(3) + 3

= 9

4 0

3 years ago

Read 2 more answers

1) 8(4w - 5) = 2) 7 (-35 - 6) - can you help me solve these

tankabanditka [31]

1) 32w -40
2) -275

Lmk if it helped you

7 0

2 years ago

Read 2 more answers