Add the polynomials and explain how you arrived at your answer. (9p3 + 5r2 + 11r) + (-2m3 + 9r – 8r²)
(pls help)

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

What is always true when two whole numbers are subtracted?

Type the correct answer in each box. spell all the words correctly, and use numerals instead of words for numbers. if necessary, use / for the fraction bar(s).