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Question 1 of 5: Solve, give the matrix in reduced row-echelon form
$$5x+2y=-15,-x-3y=-10$$ $$5x+2y=-15$$$$-x-3y=-10$$
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Select the Correct Answer Below: Correct! Cool Emoji Not Correct! Thinking Emoji
A
$$(-2,7)$$ $$\left[ \begin{array}{cc|c}1&-2&7\\ 1&1&7 \end{array}\right] $$
B
$$(-5,5)$$ $$\left[ \begin{array}{cc|c}1&-5&-5\\ 1&5&5 \end{array}\right] $$
C
$$(-5,5)$$ $$\left[ \begin{array}{cc|c}1&0&-5\\ 0&1&5 \end{array}\right] $$
D
$$(4,2)$$ $$\left[ \begin{array}{cc|c}1&0&4\\ 0&1&2 \end{array}\right] $$
E
No Solution
Question 2 of 5: Solve, give the matrix in reduced row-echelon form
$$-25x-19y=-1,-21x-20y=84$$ $$-25x-19y=-1$$$$-21x-20y=84$$
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Select the Correct Answer Below: Correct! Cool Emoji Not Correct! Thinking Emoji
A
$$(7,-2)$$ $$\left[ \begin{array}{cc|c}1&-2&7\\ 1&1&0 \end{array}\right] $$
B
No Solution
C
$$(15,13)$$ $$\left[ \begin{array}{cc|c}1&1&15\\ 0&13&0 \end{array}\right] $$
D
$$(21,-16)$$ $$\left[ \begin{array}{cc|c}1&0&21\\ 0&1&-16 \end{array}\right] $$
E
$$(16,-21)$$ $$\left[ \begin{array}{cc|c}1&0&16\\ 0&1&-21 \end{array}\right] $$
Question 3 of 5: Solve, give the matrix in reduced row-echelon form
$$30x-2y=-27,15x-y=36$$ $$30x-2y=-27$$$$15x-y=36$$
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Select the Correct Answer Below: Correct! Cool Emoji Not Correct! Thinking Emoji
A
$$(-1,0)$$ $$\left[ \begin{array}{cc|c}1&0&-1\\ 0&1&0 \end{array}\right] $$
B
$$(-3,-2)$$ $$\left[ \begin{array}{cc|c}1&1&-3\\ 1&1&-2 \end{array}\right] $$
C
$$(12,-7)$$ $$\left[ \begin{array}{cc|c}1&0&12\\ 0&1&-7 \end{array}\right] $$
D
No Solution
E
$$(8,-1)$$ $$\left[ \begin{array}{cc|c}-8&0&1\\ 0&-1&1 \end{array}\right] $$
Question 4 of 5: Solve, give the matrix in reduced row-echelon form
$$7x-6y=20,3x+3y=-36$$ $$7x-6y=20$$$$3x+3y=-36$$
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Select the Correct Answer Below: Correct! Cool Emoji Not Correct! Thinking Emoji
A
$$(0,9)$$ $$\left[ \begin{array}{cc|c}1&0&9\\ 0&1&0 \end{array}\right] $$
B
$$(-2,3)$$ $$\left[ \begin{array}{cc|c}1&1&-2\\ 1&1&3 \end{array}\right] $$
C
No Solution
D
$$(-4,-8)$$ $$\left[ \begin{array}{cc|c}1&0&-4\\ 0&1&-8 \end{array}\right] $$
E
$$(-5,4)$$ $$\left[ \begin{array}{cc|c}1&0&-5\\ 0&1&4 \end{array}\right] $$
Question 5 of 5: Solve, give the matrix in reduced row-echelon form
$$-17x+16y=15,-14x+6y=-2$$ $$-17x+16y=15$$$$-14x+6y=-2$$
Finish »
Select the Correct Answer Below: Correct! Cool Emoji Not Correct! Thinking Emoji
A
No Solution
B
$$(8,9)$$ $$\left[ \begin{array}{cc|c}0&1&8\\ 1&0&9 \end{array}\right] $$
C
$$(-3,-4)$$ $$\left[ \begin{array}{cc|c}1&-3&0\\ -4&0&0 \end{array}\right] $$
D
$$(5,7)$$ $$\left[ \begin{array}{cc|c}1&0&5\\ 0&1&7 \end{array}\right] $$
E
$$(1,2)$$ $$\left[ \begin{array}{cc|c}1&0&1\\ 0&1&2 \end{array}\right] $$

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