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nika2105 [10]
3 years ago
11

A drinking straw has a circumference of 30 mm and a height of 210 mm.

Mathematics
1 answer:
dexar [7]3 years ago
3 0
I think the straw can hold about 15000 mm^3.
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Solve the equation x^2-4x+85=0
lara [203]
Can't factor
use quadratic
for
ax^2+bx+c=0
x=\frac{-b+/- \sqrt{b^2-4ac} }{2a}

given
1x^2-4x+85=0
a=1
b=-4
c=85

x=\frac{-(-4)+/- \sqrt{(-4)^2-4(1)(85)} }{2(1)}
x=\frac{4+/- \sqrt{16-340} }{2}
x=\frac{4+/- \sqrt{-324} }{2}
x=\frac{4+/- (\sqrt{-1})(\sqrt{324}) }{2}
remember that √-1=i
x=\frac{4+/- i(\sqrt{324}) }{2}
x=\frac{4+/- i(18) }{2}
x=2+/-9i

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3 years ago
If 5 boxes of cereal cost $27.50, how much does one box of cereal cost? a) $5.50 b) $5.05 c) $550 d) .55​
olga_2 [115]

}

Answer:B

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8 0
2 years ago
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What is the circumference of the given circle in terms of pi 12in ( 1 point?
mina [271]
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3 years ago
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Answer:

Factor {x}^{2}-4x-5x

​2

​​ −4x−5.

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2 Solve for x.

x=5,-1x=5,−1

Step-by-step explanation:

7 0
3 years ago
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Find 1/4+13/20<br> . Write your answer as a fraction in simplest form.
jek_recluse [69]
The LCD here is 20.  Thus, 1/4 = 5/20.  The sum of 5/20 and 13/20 is 18/20, which can be reduced to 9/10.
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