What is the sum of the polynomials

(2x^4 - 3x^3 - x - 1) + (8x^3 + 3x -5)

i have to turn this in

What is r i 4.5+10r=-6.5 with work pls

For the inequality |c| < |d| to be true, which of the following must be true?

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.