B a perfect cube because 5 cubed is 125
258 = 240 + 18
258: 6 = (240 + 18) : 6 = 240 : 6 + 18 : 6 = 40 + 3 = 43
Your answer is 43.
Answer:
A = 4.7
Step-by-step explanation:
To find the missing leg, use this formula:

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1. x midpoint: (-9+4)/(2) = -2
2. y midpoint: (3+7)/(2) = 5
3. The midpoint is (-2,5)