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3 years ago

Is 2750 a reasonable answer for 917 x 33?

Mathematics

1 answer:

irinina [24]3 years ago

7 0

Line them up on top of each other so it would be 30,261 so you were close but you have to line them up correctly

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3 years ago

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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

4 0

3 years ago

a medication prescription states 1/4 tablet twice a day per 20kg the peson weight is 211 pounds. how many tablets should be take

Black_prince [1.1K]

<h2>Hello!</h2>

The answer is: 1.187 tablets each time (twice a day)

From the statement we know that 0.25 tablet (1/4) should be taken twice a day per 20 kg, it makes 0.5 table a day, per 20 kg.

First, we need to convert the given weight unit (pounds) to kg:

$1 Pound=0.45Kg$

So,

$211Pounds*\frac{0.45Kg}{1Pound}= 94.95Kg=95Kg$

A weight of 95 Kg, means 4.75 times more than the given information of 0.5 table a day, per 20 Kg

$\frac{95Kg}{20Kg}=4.75$

Then,

$4.75*(0.5)=2.375$

So,

For a weight of 95 Kg, 2.375 tablets should be taken a day, or 1.187 tablets each time.

Have a nice day!

6 0

3 years ago