Answer
$\color{blue}{\bf{(a) y_1=x(0.02) }}$
$\color{blue}{\bf{(b) y_2=(x+500)(0.015) }}$
$\color{blue}{\bf{(c) y_1+y_2}}$$\color{blue}{\text{ is the combined interest of the two savings accounts} }$
$\color{blue}{\bf{(d) {$}16.25} }$
Work Step by Step
$\bf{(a)}$ $y_1$ is the interest from the first savings account where $x$ dollars are deposited at $2%$% simple interest
$\color{blue}{y_1=x(0.02)}$
$\bf{(b)}$$y_2$ is the interest from the second savings account where ${$}$500 more than the first account are deposited at $1.5$% simple interest
$\color{blue}{y_2=(x+500)(0.015)}$
$\bf{(c)}$ $\color{blue}{y_1+y_2 \text{is the combined interest of the two savings accounts}}$
$\bf{(d)}$ If ${$}$250 is deposited in the first account, the total interest is:
$y_1(250)+y_2(250)$
$(250)(0.02)+(250+500)(0.015)$
$5+11.25$
$\color{blue}{{$}16.25}$
