13. A system of two linear equations in two variables is shown on the coordinate grid.
Which system of equations does the graph represent?
\(3 x - y = 1 \)
\( 3 x - 2 y = 8 \)
\( 3 x - y = - 1 \)
\( 3 x + 2 y = - 16 \)
\( 3 x + y = 1 \)
\( 3 x - 2 y = 8 \)
\( 3 x + y = 1 \)
\( 3 x - 2 y = 16\)
\(3 x + y = 1 \)
\( 3 x - 2 y = 16\)
How long will it take \(\$ 1500\) to double itself at \(6 \%\) sim- ple interest?
A pharmacist makes eye drops with saline solution. A \(10 \%\) saline solution mixed with an \(80 \%\) saline solution makes \(7\) cups of a \(60 \%\) saline solution. How many cups of the \(80 \%\) solution should be used?
