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2 years ago

15

The wheel on a bicycle has a diameter of 20 centimeters. What is the length of the rubber required to make a tire that will cove

r the outside of the wheel?

2 answers:

Jlenok [28]2 years ago

8 0

The answer to this is B

Travka [436]2 years ago

3 0

Answer:

B

Step-by-step explanation:

I only remember the answer but here ya go! :)

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FURTHER MATHEMATICS Use determinants to solve the systems of equation:

maw [93]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}2x+1y+2z&=&13\\1x+1y-2z&=&8\\1x+2y+1z&=&11\\\end{array}\right.\\\\\\\Delta=\left| \begin{array}{ccc}2&1&2\\1&1&-2\\1&2&1\end{array}\right| =2*\left| \begin{array}{ccc}1&\frac{1}{2}&1\\1&1&-2\\1&2&1\end{array}\right| =2*\left| \begin{array}{ccc}1&\frac{1}{2}&1\\0&\frac{1}{2}&-3\\0&1&3\end{array}\right| =2*(\frac{3}{2}+3)=9\\\\$

$\Delta_1=\left| \begin{array}{ccc}13&1&2\\8&1&-2\\11&2&1\end{array}\right| =2*\left| \begin{array}{ccc}13&1&2\\8&1&-2\\\frac{11}{2}& 1&\frac{1}{2}\end{array}\right| =2*\left| \begin{array}{ccc}13&1&2\\-5&0&-4\\\frac{-5}{2}& 0&\frac{5}{2}\end{array}\right| \\\\=2*(-1)*(\frac{-25}{2}-\frac{20}{2}) =45\\$

$\Delta_2=\left| \begin{array}{ccc}2&13&2\\1&8&-2\\1&11&1\end{array}\right| \\\\\\=\left| \begin{array}{ccc}3&21&0\\3&30&0\\1&11&1\end{array}\right| \\\\\\=1*(90-63) =27\\$

$\Delta_3=\left| \begin{array}{ccc}2&1&13\\1&1&8\\1&2&11\end{array}\right| \\\\\\=\left| \begin{array}{ccc}0&-1&-3\\0&-1&-3\\1&2&11\end{array}\right| \\\\\\=0\\$

$\left\{\begin{array}{ccc}x=\dfrac{\Delta_1}{\Delta}=\dfrac{45}{9}=5\\\\y=\dfrac{\Delta_2}{\Delta}=\dfrac{27}{9}=3\\\\z=\dfrac{\Delta_3}{\Delta}=\dfrac{0}{9}=0\\\end{array}\right.$

8 0

3 years ago

irakobra [83]

We have that the total length of paper needed to cover all the tables is

$X=288.5ft$

From the question we are told that:

Number of tables $n=36$

Length of table $l=8$

Extension $e=3 inch =>0.25feet$

Generally, the equation for the Total length tables is mathematically given by

$l_t=n*l\\\\l_t=36*8$

$l_t=288ft$

Therefore with an extension of 0.25ft at both end we have the Total length of tablecloths to be

$X=l_t+2(e)\\\\X=288ft+2(0.25)$

$X=288.5ft$

In conclusion

The total length of paper needed to cover all the tables is

$X=288.5ft$

For more information on this visit

brainly.com/question/12595620

6 0

3 years ago

Subtract. 4x2-5x+1 - (2x2+9x-6)

Vinvika [58]

Answer:

4x^2 -5x + 1 - 2x^2 - 9x + 6

2x^2 - 14x + 7

Step-by-step explanation:

8 0

3 years ago

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What is g(f(1)) using the table?

Nuetrik [128]

Answer:

?

Step-by-step explanation:

can you explain it a little better?

5 0

3 years ago

Kelley swims laps for 25 minutes each day.How many minutes does she spend swimming laps in 14 days

crimeas [40]

Answer:

350 Laps

Step-by-step explanation:

25•14=350

6 0

3 years ago

Read 2 more answers