Answer:
3.5
Step-by-step explanation:
Solve for y:
[tex]\dfrac{1}{9}:(0.8y)=\dfrac{1}{7}:3.6[/tex]
First rewrite it as proportion:
[tex]\dfrac{\frac{1}{9}}{0.8y}=\dfrac{\frac{1}{7}}{3.6}[/tex]
Cross multiply:
[tex]\dfrac{1}{9}\cdot 3.6=\dfrac{1}{7}\cdot 0.8y\\ \\0.4=\dfrac{0.8y}{7}[/tex]
Multiply it by 70:
[tex]28=8y\\ \\y=\dfrac{28}{8}=\dfrac{7}{2}=3.5[/tex]
