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lutik1710 [3]
3 years ago
12

HELPPP!!! What is 4^(1) x 4^(2) and please show the steps!!

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
6 0

{4}^{1}  = 4 \\ 4 {}^{2}  = 4 \times 4 = 16 \\  \\  {4} + 16 = 20
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What is the solution to the following system?
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(4,3,2)

Step-by-step explanation:

We can solve this via matrices, so the equations given can be written in matrix form as:

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\left[\begin{array}{cccc}1&-4&-1&-10\\2&1&2&15\\3&2&1&20\end{array}\right]

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\frac{R_2}{9}=R_2


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\left[\begin{array}{cccc}1&0&\frac{7}{9}&\frac{50}{9}\\0&1&\frac{4}{9}&\frac{35}{9}\\0&0&-\frac{20}{9}&-\frac{40}{9}\end{array}\right]


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-\frac{4}{9}R_3+R_2=R2 , -\frac{7}{9}R_3+R_1=R_1


\left[\begin{array}{cccc}1&0&0&4\\0&1&0&3\\0&0&1&2\end{array}\right]


Therefore the solution to the system of equations are (x,y,z) = (4,3,2)

Note: If answer choices are given, plug them in and see if you get what is "equal to".  Meaning plug in 4 for x, 3 for y and 2 for z in the first equation and you should get 20, second equation -10 and third 15.

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