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3 years ago

Is a cube a polygon? Why or why not?

Mathematics

2 answers:

Elan Coil [88]3 years ago

5 0

no because it isn't 2 dimensional. it is actually considered a polyhedron (a solid figure with flat sides)

SOVA2 [1]3 years ago

4 0

No, because a polygon has to be vertical and a cube is straight.

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PLs help 50 PTS!!!!! PLEASE ILL GIVE BRAINLIEST!!!!!

Nookie1986 [14]

Answer:

$\large\boxed{y=\dfrac{1}{4}x^2-x-4}$

Step-by-step explanation:

The equation of a parabola in vertex form:

$y=a(x-h)^2+k$

(h, k) - vertex

The focus is

$\left(h,\ k+\dfrac{1}{4a}\right)$

We have the vertex (2, -5) and the focus (2, -4).

Calculate the value of a using $k+\dfrac{1}{4a}$

k = -5

$-5+\dfrac{1}{4a}=-4$ add 5 to both sides

$\dfrac{1}{4a}=1$ multiply both sides by 4

$4\!\!\!\!\diagup^1\cdot\dfrac{1}{4\!\!\!\!\diagup_1a}=4$

$\dfrac{1}{a}=4\to a=\dfrac{1}{4}$

Substitute

$a=\dfrac{1}{4},\ h=2,\ k=-5$

to the vertex form of an equation of a parabola:

$y=\dfrac{1}{4}(x-2)^2-5$

The standard form:

$y=ax^2+bx+c$

Convert using

$(a-b)^2=a^2-2ab+b^2$

$y=\dfrac{1}{4}(x^2-2(x)(2)+2^2)-5\\\\y=\dfrac{1}{4}(x^2-4x+4)-5$

use the distributive property: a(b+c)=ab+ac

$y=\left(\dfrac{1}{4}\right)(x^2)+\left(\dfrac{1}{4}\right)(-4x)+\left(\dfrac{1}{4}\right)(4)-5\\\\y=\dfrac{1}{4}x^2-x+1-5\\\\y=\dfrac{1}{4}x^2-x-4$

3 0

3 years ago

Is 4/8 bigger or smaller than 1/2

jeka94

There are the same because 4/8 is rudeced to 1/2

8 0

3 years ago

Read 2 more answers

Write down the output y in terms of x

atroni [7]

Answer:

the x means 9

Step-by-step explanation:

6 0

3 years ago

What is the square root of s/16 simplified

GREYUIT [131]

It will be 16[tex] 16^{2} = 256

7 0

3 years ago

Read 2 more answers

In his last football game, Sean rushed for 89 yards. If his season total is 871 yards, how many total yards did he have prior to

Vera_Pavlovna [14]

Answer:

782

Step-by-step explanation:

Since it's asking for the before game miles youd have to take he total yards.

(871)

The you wanna take the total yards ran from that one game.

(89)

Then just subtract by the number of yards total and the number of yards ran in that one game.

871-89=782

3 0

3 years ago