I need help again cause I’m dumb

B  

Step-by-step explanation:

8x - 10y = - 80

If you put in slope intercept for m:

y = mx + b

m = slope

b = y intercept

You can find the perpendicular line and its slope.

8x - 10y = - 80     Add 80 to each side

8x + 80 - 10y = -80 + 80

8x + 80 - 10y = 0   Add 10y to each side

8x + 80 - 10y + 10y = 0 + 10y

8x + 80 = 10y  Divide each side by 10

(8x + 80)/10 = 10y/10

(8x + 80)/10 = y

8x/10 + 80/10 = y

(4/5)x + 8 = y

Our slope is 4/5

A perpendicular slope is the negative reciprocal of any other slope.

So the negative reciprocal of is

38.6°

step-by-step explanation:

resultant is 10 pound

smaller force = 8 pound

angle formed = tan⁻¹(

                        =tan⁻¹(

                          =tan⁻¹(0.8)

                        =38.6°