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3 years ago

A circular rug has a diameter of 6 feet. What is the area of the rug?

Mathematics

2 answers:

podryga [215]3 years ago

7 0

Answer:

The answer to your question is: letter B

Step-by-step explanation:

Data

diameter = 6 ft

area = ?

Formula

A = πr²

radius = diameter / 2

= 6 / 2

= 3 ft

Substitution

A = π(3)²

= 28.27 ft²

Verizon [17]3 years ago

3 0

Answer:

It's my B. The answer is B. "Get it"

Step-by-step explanation:

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-x=-y+2 and 3y+4=2x solve using matrices

MissTica

$\begin{cases}-x=-y+2\\3y+4=2x\end{cases}\implies\begin{cases}x-y=-2\\2x-3y=4\end{cases}$

In matrix form, this is

$\begin{bmatrix}1&-1\\2&-3\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}-2\\4\end{bmatrix}$

The coefficient matrix has determinant

$\begin{vmatrix}1&-1\\2&-3\end{vmatrix}=-3+2=-1\neq0$

so it has an inverse, which is

$\begin{bmatrix}1&-1\\2&-3\end{bmatrix}^{-1}=\begin{bmatrix}3&-1\\2&-1\end{bmatrix}$

Multiply both sides by the inverse matrix:

$\begin{bmatrix}3&-1\\2&-1\end{bmatrix}\begin{bmatrix}1&-1\\2&-3\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}3&-1\\2&-1\end{bmatrix}\begin{bmatrix}-2\\4\end{bmatrix}$

$\implies\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}-10\\-8\end{bmatrix}$

so that $x=-10$ and $y=-8$ .

8 0

3 years ago

PLEASE HELP AND EXPLAIN THIS ALSO GRAPH PLS the answer choices are -6, -4, 6, 4

liubo4ka [24]

$\sf \: (x,y) = ( - 4, - 6)$

$\rule{300pt}{3pt}$

Detailed solution can be found in the attachment!!~

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2 years ago

Mary got a sales job at her father's company. She was paid $9 per hour plus a 5%commission on her sales. Last week sheworked 40

horsena [70]

Answer:

Mary was paid $638

Step-by-step explanation:

Mary was paid 360 $ for working alone because

$40 * 9 = $360

Mary was paid $278

5 % * $5560 = $278

360 + 278 = 638 $

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2 years ago

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Answer:

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3 years ago

Help this has to be don today or my grade on it will be a 60

mariarad [96]

Answer:

$\frac{5}{13}$

Step-by-step explanation:

If you have the same denominator, you can just subtract the numerators normally and carry over the denominator.

7 0

2 years ago

Read 2 more answers