What is the speed of sound in the form of mph?

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]

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.