What is the value for f(x)=3^2x+1 when x=1/2

A:3
B:6
C:9
D:15

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2 = 1 and x^2/8^2-y^2/6^2 the foci of both graphs are the same points. the lengths of both transverse axes are the same. the directrices of = 1 are horizontal while the directrices of = 1 are vertical. the vertices of = 1 are on the y-axis while the vertices of = 1 are on the x-axis.

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)