## Algebra 1

Write an equation for d. $\frac{d}{F}=0.8\longrightarrow$ multiply each side by F $\frac{d}{F} \times F=0.8F\longrightarrow$ multiply $d=0.8F$ Substitute the upper and lower quantities for F to find the range for d. $0.8(25)\leq d\leq0.8(40)\longrightarrow$ multiply $20\leq d \leq32$