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3 years ago

23 is what percent of 126?

Mathematics

1 answer:

Fiesta28 [93]3 years ago

6 0

Answer:

18.25%

Step-by-step explanation:

23/126 = x/100

126/100 = 1.26

23/1.26 = 18.253968254

Round to the nearest hundredth: 18.25

Therefore, 23 is 18.25% of 126.

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if the formula for the perimeter of a rectangle is p=2l+2w, what is the formula for w in terms of p and l

aleksklad [387]

Answer:

(p-2l)/2 = w

Step-by-step explanation:

p=2l+2w

We want to solve for w.

The first step is to subtract 2l from each side

p-2l=2l-2l+2w

p-2l=2w

Then we will divide each side by 2 to isolate w

(p-2l)/2 = 2w/2

(p-2l)/2 = w

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3 years ago

Three times the difference between eighteen and thirteen

olchik [2.2K]

3*(18-13)
3* 5
15

The answer is 15

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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

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3 years ago

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KatRina [158]

4028 mi 2< M is the expression you were looking for i think

7 0

3 years ago

Please help me last question

fredd [130]

Answer:

The letters in the word glacier can be arranged in 5040 different ways

Step-by-step explanation:

As there are 7 letters in the word glacier, that means that the number of ways would be 7!

This can also be written as

$7*6*5*4*3*2*1=5040$

6 0

3 years ago

Read 2 more answers