Pls help! I need to know if this is right! 50 points!

A small delivery company can deliver only in a small part of the city. Write an equation for the boundary where the company delivers. and find its radius.

Select the appropriate response:

A) (x+1)2+(y-1)2= 25 radius = 5 miles

B) (x-1)2+(y+1)2= 25 radius = 5 miles

C) (x+1)2+(y-1)2= 25 radius = 10 miles

D) (x-1)2+(y+1)2= 25 radius = 10 miles

B) (x-1)2+(y+1)2= 25 radius = 5 miles

Step-by-step explanation:

Equation of a circle:

(x - h)² + (y - k)² = r²

(h,k) = (1, -1)

r = 5

(x - 1)² + (y - -1)² = 5²

(x - 1)² + (y + 1)² = 25

answer: a. 74

step-by-step explanation:

it shows divided evenly, so add the 37+37 = 74

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.