question 12 and 13 (show work)

Mathematics
Tutor: None Selected Time limit: 1 Day

Nov 18th, 2014

12

8x+3+10x-5 = 124  (exterior angle =sum of interior opposite angles

18x-2 =124

18x =126

x =126/18 =7

Angle A = 10x-5 =65 degrees

Angle B = 8x+3 = 59 degrees

13

2x^2-25= x^2

2x^2-x^2=25

x^2=25

x=5

Angle = 25 degrees

Nov 18th, 2014

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