Someone thxs!

jeanette likes to swim at the local ymca. last month she swam 3
1
15
laps on 12 different days.

how many total laps did jeanette swim last month?
a) 36
13
15
laps
b) 36
12
15
laps
c) 37
1
15
laps
d) 37
11
15
laps

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Which is the graph of the piecewise function f(x)? f(x)=[tex]f(x) = \left \{ {{-x+1, x\leq 0 } \atop {x+1, x\ \textgreater \ 0}} \right.[/tex]

Can someone me with this problem i don't understand i need