Question

this maths question pls​

Answer 1

Answer:

Step-by-step explanation:

4)

Let the angle be x 2x 3x and 4x

x +2x + 3x + 4x = 360 [Angle sum property of quadrilateral]

10x = 360

x = 36

So, the angles are 36, 72, 108 and 144

5)

Let the cost of fountain pen be b and ball pen be a

a = b/3 - 4

a + 4 = b/3

3a + 12 = b

3a - b = -12

Hope for brainliest!!!