2 years ago

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Mathematics

1 answer:

kiruha [24]2 years ago

4 0

Answer:

17 512 dm3 27 28 dm3 37 43 dm3 47 52 92 cm3 57 42 m3

Step-by-step explanation:

17 volume= 8x8x8= 512 dm3

27 volume= 3.5x4x2= 28m3

37 volume= 4x2, 5x4.3= 43 dm3

47 volume= 18x14x21= 5292 cm3

57 volume= 4x3x3.5= 42 m3

the volume cuboid = length x width x height )

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30 Points!!

neonofarm [45]

Answer:

multiply the left side of the constant vector by the inverse matrix

Step-by-step explanation:

The matrix equation ...

AX = B

is solved by left-multiplying by the inverse of A:

A⁻¹AX = A⁻¹B

IX = A⁻¹B . . . . . the result of multiplying A⁻¹A is the identity matrix

X = A⁻¹B . . . . . B needs to be multiplied by the inverse matrix

$\left[\begin{array}{c}x&y\end{array}\right] = \left[\begin{array}{cc}-4&1\\3&2\end{array}\right]^{-1}\left[\begin{array}{c}9&7\end{array}\right]=\dfrac{1}{11}\left[\begin{array}{cc}-2&1\\3&4\end{array}\right]\left[\begin{array}{c}9&7\end{array}\right]=\left[\begin{array}{c}-1&5\end{array}\right]$