3 years ago

Which rotational direction would move the point (0,9) to (-9,0) by a rotation of 90 degrees

Mathematics

1 answer:

Goshia [24]3 years ago

8 0

Answer:

(9,0)...................

step-by-step explanation:

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A mixture of compounds X and Y in a 0.100-cm cell had an absorbance of 0.215 at 272 nm and 0.191 at 327 nm. Find [X] and [Y] in

Oksi-84 [34.3K]

Answer: The concentration of X is $7.13582\times 10^{-6}$ and the concentration of Y is $2.53159\times 10^{-5}$ .

Step-by-step explanation:

Since we have given that

At 272 nm, absorbance = 0.215

At 327 nm, absorbance = 0.191

As we have given that

Compound X Compound Y

272 16400 3870

327 3990 6420

So, our equations becomes

$16400C_1+3870c_2=0.215\\\\3990C_1+6420C_2=0.191$

By solving these two equations, we get that

$C_1=7.13582\times 10^{-6}\\\\C_2=2.53159\times 10^{-5}$

Hence, the concentration of X is $7.13582\times 10^{-6}$ and the concentration of Y is $2.53159\times 10^{-5}$ .

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4 years ago

He statement below describes a situation in which opposite quantities combine to make zero:

kozerog [31]

False I’m pretty sure

3 0

3 years ago

Really need help with it can anyone help me

Gekata [30.6K]

VR // TS is true,

as when reflected image is translated by 2 unit right than it will make it rectangle

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4 years ago

Please I really need help my grade depends on it

DochEvi [55]

Answer:

Step-by-step explanation:

Given the solution

2 < x ≤ 24

The ≤ symbol means less than or equal to

Thus x can equal 24

At the other end 2 < x which means x cannot equal 2

Thus x = 24 will make the inequality true

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3 years ago

Read 2 more answers

HELP

dybincka [34]

Answer:

y=2×+1 im a bit rusty hope this helps in some way

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3 years ago