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Gre4nikov [31]
3 years ago
8

Will mark brainliest.

Mathematics
2 answers:
Alinara [238K]3 years ago
7 0
3. FCE, DCE
4. BCF

supplementary angle = 180 degrees total.
complementary angle = 90 degrees total
snow_lady [41]3 years ago
3 0

Answer:

1.  FCE, ED   2. FCB

explanation:

Supplementary angles are two angle that when added together, equal 180°.

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If DF= 9x-39, find EF.
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Solve this equation zma=a+b ;for a
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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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Round each number to the nearest tenth.
andreev551 [17]

Answer:For the first one 26.73 would turn into 27 and 89.42 would stay 89


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