Answer choices:
f. -4 and -3
g. -2 and -1
h. 3 and 4
j. -1 and 0

Step-by-step explanation:

a) The sum of the angles in a triangle is 180 degrees. It means that

Angle A + angle B + angle C = 180 degrees

Therefore,

3x + 28 + 5x + 52 + 2x - 10 = 180

Collecting like terms, it becomes

3x + 5x + 2x + 28 + 52 - 10 = 180

10x + 70 = 180

Subtracting 70 from the left hand side and the right hand side of the equation, it becomes

10x + 70 - 70 = 180 - 70

10x = 110

Dividing the left hand side and the right hand side of the equation by 10, it becomes

10x/10 = 110/10

x = 11

b) Angle C = 2x - 10

= 2 × 11 - 10 = 22 - 10

= 12 degrees