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2 years ago

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Mathematics

1 answer:

kramer2 years ago

4 0

Answer: C (1.25, 10.25)

Step-by-step explanation:

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Hugo works in a shop.

slava [35]

Answer:

£111

Step-by-step explanation:

Money earned on saturday: 9*7=63

Money earned on sunday:4*9* $1\frac{1}{3}$ =48

48+63=111

plz mark branliest

6 0

2 years ago

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Use matrices and elementary row to solve the following system:

LiRa [457]

I assume the first equation is supposed to be

$5x-3y+2z=13$

and not

$5x-3x+2x=4x=13$

As an augmented matrix, this system is given by

$\left[\begin{array}{ccc|c}5&-3&2&13\\2&-1&-3&1\\4&-2&4&12\end{array}\right]$

Multiply through row 3 by 1/2:

$\left[\begin{array}{ccc|c}5&-3&2&13\\2&-1&-3&1\\2&-1&2&6\end{array}\right]$

Add -1(row 2) to row 3:

$\left[\begin{array}{ccc|c}5&-3&2&13\\2&-1&-3&1\\0&0&5&5\end{array}\right]$

Multiply through row 3 by 1/5:

$\left[\begin{array}{ccc|c}5&-3&2&13\\2&-1&-3&1\\0&0&1&1\end{array}\right]$

Add -2(row 3) to row 1, and add 3(row 3) to row 2:

$\left[\begin{array}{ccc|c}5&-3&0&11\\2&-1&0&4\\0&0&1&1\end{array}\right]$

Add -3(row 2) to row 1:

$\left[\begin{array}{ccc|c}-1&0&0&-1\\2&-1&0&4\\0&0&1&1\end{array}\right]$

Multiply through row 1 by -1:

$\left[\begin{array}{ccc|c}1&0&0&1\\2&-1&0&4\\0&0&1&1\end{array}\right]$

Add -2(row 1) to row 2:

$\left[\begin{array}{ccc|c}1&0&0&1\\0&-1&0&2\\0&0&1&1\end{array}\right]$

Multipy through row 2 by -1:

$\left[\begin{array}{ccc|c}1&0&0&1\\0&1&0&-2\\0&0&1&1\end{array}\right]$

The solution to the system is then

$\boxed{x=1,y=-2,z=1}$

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2 years ago

The process of completing the square will always work. <br> True<br> False

Bingel [31]

Completing the square will always work for any quadratic, because you can always manipulate any quadratic by following completing the square.

4 0

2 years ago

Write an equation in slope-intercept form of the line that passed through (-3, 4) and (1. 4)

il63 [147K]

Answer:

y= 0x+4

Step-by-step explanation:

This is a horizontal line, since both coordinate pairs end in 4, so the slope is 0. The y-intercept is 4 because each point is 4.

6 0

2 years ago

Elijah has 4 new dogs and wants to build a square fence in his backyard for them. He wants the sides to each measure (x + 6) fee

matrenka [14]

Answer:

Step-by-step explanation:

5 0

2 years ago

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