During the school year, gianna usually keeps a regular sleeping schedule. she goes to bed at 9: 15 p. m. and wakes up at 6: 30 a. m. for how long does gianna sleep on a school night? express the answer in hours and minutes.

e

step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)

the domain of a function is the set of input values, x , for which a function is defined. the domain is shown in the left oval in the picture below. the function provides an output value, f(x) , for each member of the domain.