Add polynomials

simplify:

(-5a^3 - 2a^2) + (6a^3+9a^2+8a)

Polygon hh is a scaled copy of polygon gg using a scale factor of 1/4. polygon h's area is what fraction of polygon g's area?

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.

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.