Ask question

Ask question

All categories

3 years ago

12

Sasha counted 24 feet in all of them in the barn how many dogs and birds and buyers do you think are in the barn today there are

four correct answers to this question

1 answer:

maw [93]3 years ago

3 0

(Assuming dogs have 4 feet, birds have 2 and buyers have 2)

One possibility is 4 dogs, 2 birds and 2 buyers [16 + 4 + 4]

You might be interested in

Solve the matrix equation by using inverse matrices.

STALIN [3.7K]

Answer:

x=-7, y=2

Step-by-step explanation:

You are given the matrix equation

$\left[\begin{array}{cc}2&-2\\-1&3\end{array}\right] \cdot \left[\begin{array}{c}x\\y\end{array}\right] = \left[\begin{array}{c}-18\\13\end{array}\right]$

Find the inverse matrix for the matrix

$\left[\begin{array}{cc}2&-2\\-1&3\end{array}\right]$

1. The determinant is

$\left|\left[\begin{array}{cc}2&-2\\-1&3\end{array}\right]\right|=2\cdot 3-(-1)\cdot (-2)=6-2=4$

2.

$a_{11}=2 \Rightarrow A_{11}=3\\ \\a_{12}=-2 \Rightarrow A_{12}=-(-1)=1\\ \\a_{21}=-1 \Rightarrow A_{21}=-(-2)=2\\ \\a_{22}=3 \Rightarrow A_{22}=2$

3. Inverse matrix is

$\dfrac{1}{4}\left[\begin{array}{cc}3&1\\2&2\end{array}\right]^T=\dfrac{1}{4}\left[\begin{array}{cc}3&2\\1&2\end{array}\right]$

So, the solution of the equation is

$\left[\begin{array}{c}x\\y\end{array}\right]=\dfrac{1}{4}\left[\begin{array}{cc}3&2\\1&2\end{array}\right]\cdot \left[\begin{array}{c}-18\\13\end{array}\right]=\\ \\=\dfrac{1}{4}\left[\begin{array}{cc}3\cdot(-18)+2\cdot 13\\1\cdot (-18)+2\cdot 13\end{array}\right]=\dfrac{1}{4}\left[\begin{array}{c}-28\\8\end{array}\right]=\left[\begin{array}{c}-7\\2\end{array}\right]$

8 0

3 years ago

Eudora ran from her home to her secret laboratory at an average speed of 12 km/h. Then she then took one of her jetpacks and fle

mylen [45]

Her average speed = total distance / time taken = 120 / 2 = 60 km/h.

3 0

3 years ago

Read 2 more answers

Write an equation of the line passing through (-2,4) and (3,5). Give the answer in standard form.The equation of the line in sta

Alecsey [184]

Start finding the slope of the line

$\begin{gathered} m=\frac{y_2-y_1}{x_2-x_1} \\ \text{then,} \\ m=\frac{5-4}{3-(-2)} \\ k=\frac{1}{5} \end{gathered}$

using one of the points find the intercept and the standard form

$\begin{gathered} (-2,4) \\ 4=\frac{1}{5}(-2)+b \\ b=4+\frac{2}{5} \\ b=4.4 \end{gathered}$

the equation of the line is

$y=\frac{1}{5}x+4.4$

6 0

1 year ago

Brahmagupta’s solution to a quadratic equation of the form ax2 + bx = c involved only one solution. Which solution would he have

lukranit [14]

Answer:

A

Step-by-step explanation

It is A because i took the assignment on edge ok bye thanks :)

3 0

3 years ago

Read 2 more answers

The blue dot is at what value on the number line?

Alik [6]

Answer:

17

Step-by-step explanation:

✌

7 0

2 years ago