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3 years ago

“x” means what in math equations? I’m not the best at math :/

Mathematics

2 answers:

erastovalidia [21]3 years ago

6 0

The x is the missing variable.

tino4ka555 [31]3 years ago

4 0

Answer:

X is just the variable or missing edge, side, angle .etc that you are looking for

Step-by-step explanation:

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An equation is shown -4/5 (9x-20)-3x 4/5 x -6

Amanda [17]

Answer: x=2

Step-by-step explanation:

if u plug in the value of x=2 into the equation both sides equal -22/5

5 0

3 years ago

hus, D satisfying (ABC)DequalsI exists. Why does the expression for D found above also satisfy D(ABC)equalsI, thereby showing

Assoli18 [71]

Complete Question

The complete question is shown on the first uploaded image

Answer:

First Question

Option A is correct

Second Question

Option C is correct

Third Question

$D = A^{-1} * B^{-1} * C^{-1}$

Fourth Question

So substituting for D in (ABC) D = I

$(ABC) * A^{-1} * B^{-1} * C^{-1} = I$

$I = I$

This proof that ABC is invertible

Step-by-step explanation:

From the question we are told that

A , B and C are invertible which means that $A^{-1} , B^{-1}, C^{-1}$ exist

Now

From the question

(ABC) D = I

Where I is an identity matrix

Now when we multiply both sides by $A^{-1}$ we have

$A^{-1} A BCD = A^{-1} * I$

$IBCD = A^{-1}$

Now when we multiply both sides by $B^{-1}$ we have

$B^{-1 } *I BCD = A^{-1} * B^{-1}$

$I CD = A^{-1} * B^{-1}$

Now when we multiply both sides by $C^{-1}$ we have

$C^{-1} * I CD = A^{-1} * B^{-1} * C^{-1}$

$I D = A^{-1} * B^{-1} * C^{-1}$

$D = A^{-1} * B^{-1} * C^{-1}$

So substituting for D in the above equation

$(ABC) * A^{-1} * B^{-1} * C^{-1} = I$

$I = I$

This proof that ABC is invertible

4 0

3 years ago

<img src="https://tex.z-dn.net/?f=%281.345%2A%5Cfrac%7B1%7D%7B24%7D%20%29%5E%7B24%7D" id="TexFormula1" title="(1.345*\frac{1}{24

evablogger [386]

.......................

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3 years ago

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xxMikexx [17]

Depends on how much space you have on your device

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3 years ago

P varies directly as q and inversely as y. One of the values is p=0.064 q=16 and y =5 find p when q=12 and y=10

Volgvan

P=0,024 K=0.02 IDK BROOOOOOOOOOOOOOOOOOOOOOOO

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4 years ago