4x/7-6=-20 with justification

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

The function models the number of accidents per 50 million miles driven as a function

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay