-1.6α + 2a^4 + 8.1a^3 In standard form

My options are
2a^4 + 8.1a + 1.6a

2a^4 - 1.6a + 8.1a^3

8.1a^3 + 2a^4 + 1.6a

Any help is appreciated greatly :)

3

step-by-step explanation:

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c

x=3y-6

step-by-step explanation:

solve for   x by simplifying both sides of the equation, then isolating the variable.