$\bf \begin{cases}
2x+2y=10\\
-x+y=1
\end{cases}\\\\
-------------------------------\\\\
-x+y=1\implies y=1+x\impliedby \textit{let's plug that in the first equation}
\\\\\\
2x+2(\stackrel{y}{1+x})=10\implies 2x+2+2x=10\implies 4x=8
\\\\\\
x=\cfrac{8}{4}\implies \boxed{x=2}\impliedby \textit{let's plug that in the second one}
\\\\\\
-(\stackrel{x}{2})+y=1\implies \boxed{y=3}$

7 0

3 years ago

The height of a house is 39.2 ft, a doll house replica is 2.8 ft. What is the scale<br> factor?

Tatiana [17]

I might be wrong cause I don’t removed this from 4 years ago but it should be 36.4 also plz mark brainlyiest

3 0

3 years ago