Find the sum and express it in simplest form.
(-3n^3 - 3n^2 - 5) + (8n^3 + 6n^2 - 4)

5n^3+3n^2-9

Step-by-step explanation:

you only add the coefficients

b.) 160 miles on a 5 gallons car

step-by-step explanation:

240/10=24 miles/gallon

160/5=32 miles/gallon

30/1=30 miles/gallon

168/6= 28 miles/gallon

32 miles/gallon is the most amount, so this is the best.

im with everythinglos so yeahhhhh

step-by-step explanation: