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3 years ago

I need help, what do I do?

Mathematics

1 answer:

AnnZ [28]3 years ago

6 0

I'm sorry sorry don't no understand brother

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Help, please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Crazy boy [7]

It’s the number 3 hope this helps

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3 years ago

Read 2 more answers

11. Which matrix represents the system of equations below?

dimulka [17.4K]

Answer:

$\left[\begin{array}{cccc}-12&-13&13&|15\\7&-10&-3&|11\\7&14&5&\:\:\:|-5\end{array}\right]$

Step-by-step explanation:

The system of equations is;

-12x-13y +13z =15

7x-10y-3z = 11

7x+14y +5z = -5

The coefficient matrix is $\left[\begin{array}{ccc}-12&-13&13\\7&-10&-3\\7&14&5\end{array}\right]$

The constant matrix is $\left[\begin{array}{c}15\\11\\-5\end{array}\right]$

The augmented matrix is $\left[\begin{array}{cccc}-12&-13&13&|15\\7&-10&-3&|11\\7&14&5&\:\:\:|-5\end{array}\right]$

4 0

4 years ago

Pls help fast im confuse 18 points and brainiest

Darya [45]

Answer:

Step-by-step explanation:

4 0

3 years ago

What is the y-intercept for the graph of the equation 3x-5y=15

rusak2 [61]

Answer:

Step-by-step explanation:

We need to convert function to slope-intrcept form y=mx+b, where:

3x - 5y = 15 {subtract 3x from both sides by 20}

-5y = -3x + 15 {divide both sides by (-5)}

y = 3/5x - 5 ⇒ <u> b = -5 </u>

Therefore y-intercept of the line is (0, -5)

7 0

3 years ago

Jasmine rides her bike 9 miles in 50 minutes. what is jasmines speed per hour

Firdavs [7]

<u>Given</u>:

Given that Jasmine rides her bike 9 miles in 50 minutes.

We need to determine the speed per hour.

The time taken is 50 minutes. We need to convert minutes into hours.

Thus, we have;

$\frac{50}{60}=\frac{5}{6} \ hr$

Thus, the time taken to cover 9 miles is $\frac{5}{6} h r$

<u>Speed:</u>

The speed can be determined using the formula,

$Speed =\frac{Distance}{Time}$

Substituting the values, we have;

$Speed =\frac{9}{(\frac{5}{6})}$

Simplifying, we get;

$Speed =9 \times {\frac{6}{5}}$

$Speed =\frac{54}{5}$

$Speed = 10.8$

Thus, Jasmine's speed is 10.8 miles per hour.

3 0

3 years ago