Ski resort charges snowboarder fee of $40 plus 8.5 per hour c(t)=__t+

Having a hard time understanding this question (see attachment).

Yo need asap pls ! markin da brainiest too !

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.