Question 7)

y = 55 degrees,

x = 180 - 55 = 125 degrees

Question 8)

y = 50 -20 =30 degrees

x = 130 degrees

Question 9)

y = 65 degrees, x = 180 - 65 = 115 degrees, a = 8

Question 10)

a = 5, x = 180- (46 +48) = 86 degrees, b = 12, y= 46 degrees

Question 11)

5y = 20 so y= 4,

3x+8= 29, so x = 7

Question 12)

x = 60 degrees, y= 35 degrees and z= 25 degrees

question 13)

2x+6 = 40, so x = 17, 2y - 4 = 16, so y=10

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