Help me please The darker shaded tiles are positive and the lighter ones are negative.

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

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

80 points suppose marcy made 45 posts online. if 23 of them contained an image, what percent of her posts had images? round your answer to the nearest whole percent. 54 percent 51 percent 49 percent 48 percent