9x+3y+12y-0.9x=9x+(-0.9x)+3y+12y the equation is commutative property.. how did they get that second equation?

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

The table represents a linear function. what is the slope of the function? –6 –4 4 6