Ihave no idea how to do this, does anyone have an idea to calculate this?

AOB = 55°

BOC = 87°

COD = 130°

AOD = 88°

Step-by-step explanation:

AOB = a°

= 55°

BOC = b°

= 87°

COD = c°

= 130°

AOD = 360°-AOB-BOC-COD

= 360°- a° - b° - c°

= 360° - 55° - 87° - 130°

= 88°

(Correct me if i am wrong)

Step-by-step explanation:

a + b + c + x = 360°

if a=55°

b=87°

c=130°

then x=86°

calculate angles one by one

<AOB = a = 55°

<BOC = b = 87°

<COD = c = 130°

<AOD = x = 86°

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted

step-by-step explanation:

f(x)=2x^2 -1 

translation is a function transformation that transform the function in a way of translating. by translating the function its graph is moved  up an down. moving the function f(x) 2 units to the left will be the new function g(x) with the equation: g(x)=f(x+2)=2(x+2)^2 -1