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Pachacha [2.7K]
3 years ago
15

Im getting an answer that i dont know if its correct so pls help me

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
6 0
\bf \begin{array}{llll}
18x-y=24&\implies &\quad 18x-y=24\\
9x+4y=-15&\boxed{\times -2}\implies &-18x-8y=30\\
&&--------\\
&&\qquad 0-9y=54
\end{array}\\\\
-----------------------------\\\\
-9y=54\implies y=\cfrac{54}{-9}\implies \boxed{y=-6}
\\\\\\
\textit{now, let's use that "y" in the first equation}
\\\\\\
18x-(-6)=24\implies 18x+6=24\implies 18x=18\implies \boxed{x=1}
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polly knit a total of 45 centimeters of scarf over 5 nights. how many nights. how many nights will polly have to spend knitting
Daniel [21]

Answer:

Your answer will be 567

Step-by-step explanation:

5 / 45 = 9 x 63 = 567

I hope this helps

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Work out (5.32 x 10^-7): (2.5 x 10^-5)<br>Give your answer in standard form​
Mrrafil [7]

Answer:

1.33×10^-6

Step-by-step explanation:

5.32 x 10^-7= 5.32×10^(-5-2)= 5.32×10^-2×10^(-5)

=0.0532×10^-5

(0.0532×10^-5) (2.5 x 10^-5)

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2 years ago
LAST ATTEMPT IM MARKING AS BRAINLIEST!! (Finding missing sides- similar triangles Algebraic practice )
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8 0
2 years ago
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Find the value of the variable.
Zielflug [23.3K]

Answer:

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Step-by-step explanation:

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64+64=c^2      Add 64 + 64.

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vovikov84 [41]

Answer:

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2 years ago
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