Can someone plz answer this? I need an answer to at least two questions! Plz, look at the pic to see what you have to answer! Thx!

A50% increase followed by 33 1/2% decrease

Ireally need subtract and simplify.(-y^2 – 4y - 8) – (-4y^2 – 6y + 3)show your work, ! i will mark you brainliest but you have to show your work.

The graph is supposed to show f(x) = 3 sin (x/4+1) - 1/2. which of the following are correctly represented in the graph? select two of the following that apply.