If i rode a length of 105 minutes for $6.50 and i wanted to ride an extra 30 minutes for $9 more, what is the equation?

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

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)