Question

I need help ASAP pic below

Answer 1

Explanation:

2) ∠A + ∠B = 146 {Exterior angle theorem}

5y + 3 + 4y + 8 = 146

5y + 4y + 3 + 8 = 146 {combine like terms}

9y + 11 = 146

9y = 146 -11

9y = 135

y = 135/9

y = 15

3) m∠A = 5y + 3

= 5*15 + 3

= 75 + 3

∠A = 78

4) m∠B = 4y + 8

= 4*15 + 8

= 60 + 8

m∠B = 68

5) m∠ACB + m∠A + m∠B = 180 {Angle sum property of triangle}

m∠ACB + 78 + 68 = 180

m∠ACB + 146 = 180

m∠ACB = 180 - 146

m∠ACB = 34