Seven hundred gallons of 87-octane gasoline is obtained by mixing 87-octane gasoline with 90-octane gasoline.Use a graphing utility to graph the two given equations.Let x and y represent the number of gallons of the 87-octane gasoline and 90-octane gasoline.As the number of gallons of the 87-octane gasoline increases,how does the number of gallons of the 90-octane gasoline change? $$\left\{ \begin{array} { l }
x + y = 700 \
87 x + 90 y = 60,900
\end{array} \right.$$
A) Increases
B) Decreases
C) Decreases
D) Increases
E) Decreases

Question

Seven hundred gallons of 87-octane gasoline is obtained by mixing 87-octane gasoline with 90-octane gasoline.Use a graphing utility to graph the two given equations.Let x and y represent the number of gallons of the 87-octane gasoline and 90-octane gasoline.As the number of gallons of the 87-octane gasoline increases,how does the number of gallons of the 90-octane gasoline change?​ $$\left\{ \begin{array} { l } 
x + y = 700 \
87 x + 90 y = 60,900
\end{array} \right.$$ ​
A)​ Increases 
B)​ Decreases 
C)​ Decreases 
D)​ Increases 
E)​ Decreases

Quizplus · Accepted Answer

The Answer of Seven hundred gallons of 87-octane gasoline is obtained by mixing 87-octane gasoline with 90-octane gasoline.Use a graphing utility to graph the two given equations.Let x and y represent the number of gallons of the 87-octane gasoline and 90-octane gasoline.As the number of gallons of the 87-octane gasoline increases,how does the number of gallons of the 90-octane gasoline change?​ $$\left\{ \begin{array} { l } 
x + y = 700 \
87 x + 90 y = 60,900
\end{array} \right.$$ ​
A)​ Increases 
B)​ Decreases 
C)​ Decreases 
D)​ Increases 
E)​ Decreases

Seven Hundred Gallons of 87-Octane Gasoline Is Obtained by Mixing {x+y=70087x+90y=60,900\left\{ \begin{array} { l } x + y = 700 \\87 x + 90 y = 60,900\end{array} \right.{x+y=70087x+90y=60,900​

Seven Hundred Gallons of 87-Octane Gasoline Is Obtained by Mixing $\left\{ \begin{array} { l } x + y = 700 \\87 x + 90 y = 60,900\end{array} \right.$