Trigonometry i dont know how to do this at all need help

The variable in a relation who’s value depends on the value of the independent variable is called what?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Miranda is braiding her hair. then she will attach beads to the braid. she wants 1_3 of the beads to be red. if the greatest number of beads that will fit on the braid is 12,what other fractions could represent the part of the beads that are red?