Answer:
58°
Step-by-step explanation:
<h3>Angle sum property of triangle:</h3>
The sum of all angles of a triangle is 180°.
x + 69 + 55 + x + 78 = 180
x + x + 69 + 55 + 78 = 180
Combine like terms,
2x + 202 = 180
Subtract 202 from both sides,
2x = 180 - 202
2x = -22
Divide both sides by 2,
x = -22/2
x = -11
∠A = x + 69
= -11 + 69

Step-by-step explanation:
Option D is the correct answer because we will cross multiply
4/6 = 9/x
4x = 54
X = 27/2
Answer:
36⅓
Step-by-step explanation:
3^3+7(2x÷6)
if x=4
3³ + 7 (2x ÷ 6)
= 27 + 7[ 2(4) ÷ 6]
= 27+ 7[ 8÷6]
= 27 + 7(4/3)
= 27 + 28/3
= (81+28)/3
= 109/3
= 36⅓
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