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2 years ago

How do I solve c=2πr

Mathematics

1 answer:

Xelga [282]2 years ago

5 0

Find out what pi is and take 2× what ever number is pi and you will get an answer C=

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See question in attached photo.

statuscvo [17]

9514 1404 393

Answer:

(a, b) = (-2, -1)

Step-by-step explanation:

The transpose of the given matrix is ...

$A^T=\left[\begin{array}{ccc}1&2&a\\2&1&2\\2&-2&b\end{array}\right]$

Then the [3,1] term of the product is ...

$(A\cdot A^T)_{31}=\left[\begin{array}{ccc}a&2&b\end{array}\right]\cdot\left[\begin{array}{ccc}1&2&2\end{array}\right]=a+2b+4$

and the [3,2] term is ...

$(A\cdot A^T)_{32}=\left[\begin{array}{ccc}a&2&b\end{array}\right]\cdot\left[\begin{array}{ccc}2&1&-2\end{array}\right]=2a-2b+2$

Both of these terms in the product matrix are 0. We can solve the system of equations by adding these two terms:

(a +2b +4) +(2a -2b +2) = (0) +(0)

3a +6 = 0

a = -2

Substituting for 'a' in term [3,1] gives ...

-2 +2b +4 = 0

b = -1

The ordered pair (a, b) is (-2, -1).

8 0

2 years ago

Write an equation in slope-intercept form for each graph shown. Please help!!!!!!!

stiv31 [10]

Answer:

y = 2x-3

Step-by-step explanation:

We have 2 points so we can find the slope

m = (y2-y1)/(x2-x1)

= (1--3)/(2-0)

= (1+3)/(2-0)

=4/2

= 2

The y intercept (where x=0) is -3

We can use the slope intercept form of the equation

y= mx+b where m is the slope and b is the y intercept

y = 2x-3

3 0

3 years ago

Read 2 more answers

What is the fraction for the following decimal expansion 0.3 P.S theres a line over the 3

Anarel [89]

The answer is 3/10!!!!!

6 0

3 years ago

Read 2 more answers

When bands play at the arena the money made from ticket sales is split in an agreed ratio. When Phillip Cage played, £21,000 was

natulia [17]

Answer:

£6000

Step-by-step explanation:

Given:

Phillip Cage played, £21,000 was split at a ratio of 2:5 between the arena and Phillip Cage.

Question asked:

How much money did the arena make from Phillip Cage's concert?

Solution:

Ratio Arena and Philip cage in which money distributed = 2 : 5

Let ratio be $x$

Money earned by Arena = $2x$

Money earned by Phillip Cage = $5x$

Phillip Cage played total for = £21,000

Money earned by Arena + Money earned by Phillip Cage = £21,000

$2x+5x=21000\\7x=21000\\$

Dividing both sides by 7

$x=3000$

Money earned by Arena = $2x$ = $2\times3000=6000$

Thus, Arena made £6000 from Phillip Cage's concert.

5 0

3 years ago

If the angles were 62 72 46 what will it be right acute or obtuse

xenn [34]

It would be a right angle because all the angles are less than 90 degrees

6 0

3 years ago

Read 2 more answers