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masya89 [10]
3 years ago
14

Solve x2 + 4x + 8 = 0.

Mathematics
2 answers:
Tanzania [10]3 years ago
6 0

Answer:

x= -2 + or - 2i

Step-by-step explanation:

olga_2 [115]3 years ago
4 0

x equals negative 2 plus or minus 2i

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The pipe has a length 29cm, internal diameter 6.5cm and thickness 0.5cm. What is the Volume
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Answer:

Length of pipe = 21 cm

Internal diameter = 4 cm

Internal radius = \frac{4}{2} = 2 cm24=2cm

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Outer radius = 2+0.5=2.5 cm

Volume of pipe =\pi R^2 h - \pi r^2 hπR2h−πr2h

Volume of pipe =\frac{22}{7} (2.5)^2 (21)-\frac{22}{7}(2)^2(21)=148.5 cm^3

=\frac{22}{7} (2.5)^2 (21)-\frac{22}{7}(2)^2(21)=148.5 cm^3722(2.5)2(21)−722(2)2(21)=148.5cm3

Hence The volume is 148.5 cubic cm.

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