Assignment: 
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Answer: 
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Explanation: 
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[ Step One ] Subtract 18 From Both Sides

[ Step Two ] Simplify

[ Step Three ] Solve With Quadratic Formula
Note: 


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[ Step Four ] Combine Solutions

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Answer:
3.25 inches, 0.75 inches, 0.7 inches, -0.55 inches, -0.75 inches
hope it help <3
<em>If the radius of a sphere is doubled, the surface area becomes four times the original surface area.</em>
Answer:
x = 5/(10 - a - b)
Step-by-step explanation:
Solve for x:
4 + 3 x - a x = 9 - 7 x + b x
Collect in terms of x:
x (3 - a) + 4 = 9 - 7 x + b x
Collect in terms of x:
x (3 - a) + 4 = x (b - 7) + 9
Subtract (b - 7) x + 4 from both sides:
x (10 - a - b) = 5
Divide both sides by 10 - a - b:
Answer: x = 5/(10 - a - b)