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3 years ago

I need help with one last problem..For extra points..

Mathematics

2 answers:

vazorg [7]3 years ago

8 0

Answer:

1/4

Step-by-step explanation:

Total 8 parts and 2 of them are red

So probability to get a red on spinning = 2/8 = 1/4

Answer

1/4

stellarik [79]3 years ago

5 0

2 out of 8 pieces are red

therefore it would equal to 2/8

However if you simplified it it would be 1/4

final answer:1/4

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Which matrix equation represents the system of equations? {-x+ 2y = 0 y= -2

Snowcat [4.5K]

We are given a system of equations,

$\begin{cases}-x+2y=0\\y=-2\\ \end{cases}$

This will translate into a 2x2 matrix of coefficients (because 2 equations and 2 unknowns),

$\begin{bmatrix}-1&2\\0&1\\ \end{bmatrix}$

The matrix will then be applied to the vector (lower dimensions on top),

$\begin{bmatrix}x\\y\\ \end{bmatrix}$

And the result vector will be whats on the other side of equals sign,

$\begin{bmatrix}0\\-2\\ \end{bmatrix}$

So to put everything together,

$\begin{bmatrix}-1&2\\0&1\\ \end{bmatrix}\begin{bmatrix}x\\y\\ \end{bmatrix}=\begin{bmatrix}0\\-2\\ \end{bmatrix}$

Hope this helps :)

6 0

3 years ago

Which value of $y$ makes the equation $3y+8=7y+11$ true?

valentinak56 [21]

value of y which satisfies equation $3y+8=7y+11$ is $y= \frac{-3}{4}$ .

Step-by-step explanation:

We have , 3y+8=7y+11 . We need to find which value of y satisfies this equation 3y+8=7y+11 :

$3y+8=7y+11$

⇒ $3y+8=7y+11$

⇒ $(3y+8)-3y=(7y+11)-3y$

⇒ $8=4y+11$

⇒ $4y+11 = 8$

⇒ $(4y+11)-11 = 8-11$

⇒ $4y= -3$

⇒ $\frac{4}{4}y= \frac{-3}{4}$

⇒ $y= \frac{-3}{4}$

Therefore, value of y which satisfies equation $3y+8=7y+11$ is $y= \frac{-3}{4}$ .

8 0

3 years ago

I need help with one last problem..For extra points..​

I need help with one last problem..For extra points..