Suppose 7x+14 ice cream cones were sold on Saturday and 6x-8 were sold on sunday what is the total number of ice cream cones sold

Can someone me with my hwplz(only the circled ones)

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?