[tex]\begin{gathered} \text{one nickel correspond to }0.05\text{ dollars , and a quarter correspond to 0.25 dollars thus }10\text{ nickels and 3 quarter corresponds to} \\ 10\cdot0.05+3\cdot0.25=0.5+0.75 \\ =1.25 \\ \\ \text{that is, \$1.25 dollars} \\ \\ \text{for x nickel and y quarter}s,\text{ the price on dollar is} \\ 0.05x+0.25y \end{gathered}[/tex]
