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Math Problems
Algebra 1
Multiply two matrices
Rule
\qquad
\newline
\begin{tabular}{|c|c|}
\newline
\hline Input & Output \\
\newline
\hline
1
1
1
&
7
7
7
\\
\newline
\hline
2
2
2
& \\
\newline
\hline
3
3
3
& \\
\newline
\hline
4
4
4
&
13
13
13
\\
\newline
\hline
\newline
\end{tabular}
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\#
8
8
8
\newline
i
\newline
Listen
\newline
Find the value of
x
x
x
.
\newline
x
=
x=
x
=
\newline
Previous
\newline
3
3
3
\newline
4
4
4
\newline
5
5
5
\newline
6
6
6
\newline
7
7
7
\newline
8
8
8
\newline
9
9
9
\newline
10
10
10
\newline
11
11
11
\newline
12
12
12
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\begin{tabular}{|c|c|c|c|c|}
\newline
\hline
x
x
x
&
3
3
3
&
6
6
6
&
9
9
9
&
12
12
12
\\
\newline
\hline
y
y
y
&
12
12
12
&
10
10
10
&
8
8
8
&
6
6
6
\\
\newline
\hline
\newline
\end{tabular}
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Find the total area of the shaded polygon.
\newline
Area of polygon
=
=
=
□
\square
□
square units
\newline
\begin{tabular}{|l|l|l|l|}
\newline
\hline \multicolumn{
9
9
9
}{|c}{
…
\ldots
…
} \\
\newline
\hline
7
7
7
&
8
8
8
&
9
9
9
&
x
\mathbb{x}
x
\\
\newline
\hline
4
4
4
&
5
5
5
&
6
6
6
& - \\
\newline
\hline
1
1
1
&
2
2
2
&
3
3
3
& - \\
\newline
\hline
0
0
0
& &
(
−
1
(-1
(
−
1
& \\
\newline
\hline
\newline
\end{tabular}
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What value of
x
x
x
makes the equation below true?
\newline
10
x
+
8
=
78
10 x+8=78
10
x
+
8
=
78
\newline
4
4
4
\newline
7
7
7
\newline
8
8
8
\newline
9
9
9
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