Nick charges $\$ 7$ for travel costs and then $\$ 10$ per hour for babysitting. Which expression always represents the number of dollars that Nick charges for $y$ hours of babysitting?
(A) $10 y+7$
(B) $y+7$
(C) $17 y-7$
(D) $10 y-7$
(E) $17 y$
Nick charges $\$ 10$ per hour of babysitting.

If Nick babysits for $y$ hours, then his charge just for babysitting is $10 y$ dollars.

In addition, Nick charges a one-time fee of $\$ 7$ for travel costs.

Thus, the expression that represents the total number of dollars that Nick charges for $y$ hours of babysitting is $10 y+7$.

ANswer: (A)