Problem
The manager of a 90-unit apartment complex is trying to decide what rent to charge. Experience has shown that at a rent of $\$ 700$ all of the units will be full. On average, one additional unit will be vacant for each $\$ 35$ increase in rent. Answer parts (a) through (e) below. (a) Let $x$ represent the number of $\$ 35$ increases. Find an expression for the rent for each apartment. The rent for each apartment is given by $\square$.
Solution
Step 1 ：Let $x$ represent the number of $35$ increases in rent.
Step 2 ：The rent for each apartment is given by $700 + 35x$.
Step 3 ：So, the final expression for the rent for each apartment is \(\boxed{700 + 35x}\).
