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Karolina [17]
2 years ago
11

When solving the equation, which is the best first step to begin to simplify the equation?

Mathematics
1 answer:
olasank [31]2 years ago
3 0

Answer:

hope that helps!

Step-by-step explanation:

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Find the solution of the system of equations.
irina1246 [14]

Answer:

x = -5 ;  y= -1

Step-by-step explanation:

10y = -10

y = -1

-8x = 44 -4

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4 0
2 years ago
A= [1, 3; 2, 1], B=[3, 6; -1, 1]. Find AB & BA if possible
steposvetlana [31]

Answer:

AB\Rightarrow \quad \begin{bmatrix}0 & 9\\ 5 & 13\end{bmatrix}\\BA\Rightarrow \quad \begin{bmatrix}15 & 15\\ 1 & -2\end{bmatrix}

Step-by-step explanation:

For two matrix P and Q, the product, say PQ is defined when:

The number of columns of P = The number of rows of Q

Since A is a 2×2 matrix and B is also a 2×2 matrix

Thus both AB and BA are possible.

So AB is:

AB\Rightarrow\begin{bmatrix}1 & 3\\ 2 & 1\end{bmatrix}\begin{bmatrix}3 & 6\\ -1 & 1\end{bmatrix}\\AB\Rightarrow\quad \begin{bmatrix}3\times 1+3\times (-1) & 6\times 1+3\times 1\\3\times 2+1\times (-1) & 6\times 2+1\times 1\end{bmatrix}\\AB\Rightarrow \quad \begin{bmatrix}0 & 9\\ 5 & 13\end{bmatrix}

BA is:

BA\Rightarrow\begin{bmatrix}3 & 6\\ -1 & 1\end{bmatrix}\begin{bmatrix}1 & 3\\ 2 & 1\end{bmatrix}\\BA\Rightarrow\quad \begin{bmatrix}3\times 1+6\times 2 & 3\times 3+6\times 1\\(-1)\times 1+1\times 2 & (-1)\times 3+1\times 1\end{bmatrix}\\BA\Rightarrow \quad \begin{bmatrix}15 & 15\\ 1 & -2\end{bmatrix}

8 0
3 years ago
05 lc) if x2 = 10, what is the value of x? ±square root of 10 ±square root of 20 ±5 ±20
postnew [5]
x^2=10\\x=\pm\sqrt{10}
7 0
3 years ago
Here is 70 points to be nice tell a joke here is one why is there only 7 planets because i destroyed uranus
riadik2000 [5.3K]

Answer:

lol w*f

Step-by-step explanation:

8 0
3 years ago
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1 inch on a map represents 2 miles what is the scale ratio
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Answer:

1 inch

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2 miles

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2 years ago
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