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ella [17]
3 years ago
7

What is 3x-5y=12 with a substitution of X=3y

Mathematics
1 answer:
Step2247 [10]3 years ago
8 0
3x-5y=12
X=3y

3(3y)-5y=12
9y-5y=12
4y=12
y=3

X=3y
X=3(3)
X=9
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Read 2 more answers
The area of a circle is 25pi m squared what is the circumference
IceJOKER [234]
\bf \textit{area of a circle}\\\\
A=\pi r^2\quad 
\begin{cases}
r=radius\\
-----\\
A=25\pi 
\end{cases}\implies 25\pi =\pi r^2\implies \cfrac{25\pi }{\pi }=r^2
\\\\\\
25=r^2\implies \sqrt{25}=r\implies 5=\boxed{r}\\\\
-------------------------------\\\\
\textit{circumference of a circle}\\\\
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