Step-by-step explanation:
(2x + 45)° and x° are supplmentary angles.
(Sum of angles on a straight line = 180°)
Hence 2x + 45 + x = 180, 3x = 135, x = 45.
Answer:
circumference of circle = 2×pi×r
circumference of circle = 2×3.14×12.7
circumference of circle = 79.756 in
D
You are always able to do better, and Fiona needs to reflect
[4 + (12 - 2) ÷ 5] ÷ 7
[4 + 6 / 5] / 7
[10 / 5] / 7
2 / 7
= 2/7 or 0.28571428571
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