A certain population of birds can have one of three beak lengths: short, medium, or long. Birds with short and long beaks can more easily eat seeds than birds with medium beaks. A scientist studies this population of birds for ten years. Most of the birds at the beginning of the study have medium-sized beaks.
How might natural selection change beak length in this population of birds over time? Move the labels to the boxes on the graph.
Short Beak Length
top:Average beak length at the beginning of the study.
down:Average beak length at the end of the study.
Long Beak Length
Consider the function \( f ( x ) = \sqrt { x - 4 } + 7 \) for the domain \( [ 4 , \infty ) \)
Find \( f ^ { - 1 } ( x ) \) , where \( f ^ { - 1 } \) is the inverse of \( f \) . Also state the domain of \( f ^ { - 1 } \) in interval notation.
Solve by substitution.
\(\left\{ \begin{array} { l } { 9 x + y = 18 } \\ { 4 x - 2 y = - 14 } \end{array} \right.\)
([?], [ ] \(]\)
