Question

please please please please​

Answer 1

answer.

value of a is 130°

value of b is 50°

Step-by-step explanation:

given equation :

equation 1: 2a - 5b = 10

we know that angle AOB is equal to 180 :

AO +OB = 180

hence,

equation 2: a + b = 180

multiply by 2

then

equation 3: 2a + 2b = 360

now,

equation 1 - equation 3

( 2a - 5b ) - ( 2a + 2b ) = 10 - 360

2a - 5b - 2a - 2b = -350

-7b = -350

[ divide by -7 ]

b = 50 ans.1

now replace value of b in equation 2

a + b = 180

a + 50 = 180

a = 180 - 50

a = 130 ans.2

Answer 2

A=130 degree
B=50 degree