3 years ago

Which cannot be used in a proof?

Mathematics

2 answers:

IRINA_888 [86]3 years ago

7 0

Answer:

Undefined terms

Gwar [14]3 years ago

4 0

Hello,

you may not used what you are going to prove in a proof (la thèse)

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Can someone please help me with 9 and 10

padilas [110]

Answer:for number one its q and r and then its w,x,y for the second one

Step-by-step explanation:

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3 years ago

What substitution should be used to rewrite 4x^4-21x^2+20 =0 as a quadratic equation

marysya [2.9K]

I would substitute y = x^2

4y^2 -21y+20=0

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3 years ago

Express f(x) = |x-2| +|x+2| in the non-modulus form. Hence, sketch the graph of f.

alexgriva [62]

Recall that

$|x|=\begin{cases}x&\text{if }x\ge0\\-x&\text{if }x$

There are three cases to consider:

(1) When $x+2$ , we have $|x+2|=-(x+2)$ and $|x-2|=-(x-2)$ , so

$|x-2|+|x+2|=-(x-2)-(x+2)=-2x-4$

(2) When $x+2\ge0$ and $x-2$ , we get $|x+2|=x+2$ and $|x-2|=-(x-2)$ , so

$|x-2|+|x+2|=-(x-2)+(x+2)=4$

(3) When $x-2\ge0$ , we have $|x+2|=x+2$ and $|x-2|=x-2$ , so

$|x-2|+|x+2|=(x-2)+(x+2)=2x$

So

$|x-2|+|x+2|=\begin{cases}-2x-4&\text{if }x$

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3 years ago

D’Quan’s grandmother made a quilt for his bed. The quilt is

damaskus [11]

One Square Meter= 10.764 Square Feet.
The total area of the quilt in meters is $4.465m^{2}$
As you're looking for square feet, you've then got to multiply this by 10.764
4.465*10.764= 48.06086 square feet.
Rounded, this is 48.06 square feet.
Hope this helps :)

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3 years ago

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kvv77 [185]

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3 years ago

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