Iknow what the opposite of the opposite is but i don't know what the plus sign represents in the equation

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Ateam has p points. p = 3w + d w = wins d = draws a) a football team has 5 wins and 3 draws. how many points does the team have?

Here is my question! jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?