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2 years ago

Which graph represents the system of equations? y = 2.2 y=x2 + 1

Mathematics

1 answer:

Tom [10]2 years ago

7 0

It’s the second 1 in the top corner , where the u line is perfect and the slanted line is perfect

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solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations. x-2y+

Alekssandra [29.7K]

Answer:

x = -5, y = -6, z = -3

Step-by-step explanation:

Given the system of three equations:

$\left\{\begin{array}{l}x-2y+3z=-2\\6x+2y+2z=-48\\x+4y+3z=-38\end{array}\right.$

Write the augmented matrix for the system of equations

$\left(\begin{array}{ccccc}1&-2&3&|&-2\\6&2&2&|&-48\\1&4&3&|&-38\end{array}\right)$

Find the reduced row-echelon form of the augmented matrix for the system of equations:

$\left(\begin{array}{ccccc}1&-2&3&|&-2\\6&2&2&|&-48\\1&4&3&|&-38\end{array}\right)\sim \left(\begin{array}{ccccc}1&-2&3&|&-2\\0&-14&16&|&36\\0&-6&0&|&36\end{array}\right)\sim \left(\begin{array}{ccccc}1&3&-2&|&-2\\0&16&-14&|&36\\0&0&-6&|&36\end{array}\right)$

Thus, the system of three equations is

$\left\{\begin{array}{r}x+3z-2y=-2\\16z-14y=36\\-6y=36\end{array}\right.$

From the last equation:

$y=-6$

Substitute it into the second equation:

$16z-14\cdot (-6)=36\\ \\16z=36-84\\ \\16z=-48\\ \\z=-3$

Substitute y = -6 and z = -3 into the first equation:

$x+3\cdot (-3)-2\cdot (-6)=-2\\ \\x=-2+9-12\\ \\x=-5$

7 0

3 years ago

Which of the binomials below is a factor of this trinomial?

My name is Ann [436]

X² + 4x + 4 = (x+2)²

<span>B. x + 2</span>

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3 years ago

Write 27% as a fraction.

Reil [10]

Answer:

27/100

Step-by-step explanation:

27%= 0.27= 27/100 which cannot be reduced

5 0

2 years ago

Read 2 more answers

Express each equation in slope-intercept form. -2x+4y=68, 13x+4y=284

lara31 [8.8K]

To get the answer we have to tranform into y=ax+b form
-2x+4y=68 /+2x
4y=2x+68 /:4
y= $\frac{1}{2} x+17$ - its the result

13x+4y=284 /-13x
4y=-13x+284 /:4
y= $- \frac{13}{4}+ 71$
y=- $3 \frac{1}{4}x+71$ - its the result

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3 years ago

Alex is training for his school's Jog-A Thon and needs to run at least 1 mile per day. If Alex runs to his grandma's house, whic

Sholpan [36]

True. 5/8 + 1/2 is. 9/8. Yes he have trained enough, even more than a mile

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3 years ago