HELLP does anyone know the correct answer?!

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two

c.)

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