## Algebra 1

Let t be the number of tetras you can buy. The cost of each tetra is \$3.99, or$3.99t$. If you can spend no more than \$25, the cost of the tetras must be less than or equal to \$25.$3.99t\leq25\longrightarrow$divide each side by 3.99$3.99t\div3.99\leq25\div3.99t\leq6.3$Since it is not possible to buy a fraction of a tetra and rounding up would make the cost exceed \$25, $t\leq6$