T= 0.5an + 0.5bn solve for the variable n

N=T/ 0.5a+0.5b I belive is your answer Mate:)

Step-by-step explanation:

0.5an+0.5bn=t

n(0.5a+0.5b)=t

Step 3: Divide both sides by 0.5a+0.5b.

n=t/0.5a+0.5b

T over 0.5a+0.5b

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.