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Margaret [11]
3 years ago
13

PLEASSSEEEE HELPPPP I WILL NAME BRAINLIEST

Mathematics
2 answers:
astra-53 [7]3 years ago
3 0
26.39
sin -1 of 4/9= 26.39
Anastasy [175]3 years ago
3 0

Answer:

Step-by-step explanation:

∠B=66.42

∘

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vodomira [7]
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Two similar cylinders have surface areas of 40 π square feet and 90 π square feet. What is the ratio of the height of the large
Sergio [31]
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Have a 68 66 66 and 86 what grade do i need to pass on my last test
liubo4ka [24]
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3 years ago
Rewrite the system of linear equations as a matrix equation AX = B.
iren2701 [21]

Answer:

\left[\begin{array}{ccc}1&2&5\\1&1&1\\4&6&5\end{array}\right]*\left[\begin{array}{ccc}x1\\x2\\x3\end{array}\right]=\left[\begin{array}{ccc}5\\6\\7\end{array}\right]

Step-by-step explanation:

Let's find the answer.

Because we have 3 equations and 3 variables (x1, x2, x3) a 3x3 matrix (A) can be constructed by using their respectively coefficients.

Equations:

Eq. 1 : x1 + 2x2 + 5x3 = 5

Eq. 2 : x1 + x2 + x3 = 6

E1. 3 : 4x1 + 6x2 + 5x3 = 7

Coefficients for x1 ; x2 ; x3

From eq. 1 : 1 ; 2 ; 5

From eq. 2 : 1 ; 1 ; 1

From eq. 3 : 4 ; 6 ; 5

So matrix A is:

\left[\begin{array}{ccc}1&2&5\\1&1&1\\4&6&5\end{array}\right]

And the vector of vriables (X) is:

\left[\begin{array}{ccc}x1\\x2\\x3\end{array}\right]

Now we can find the resulting vector (B) using the 'resulting values' from each equation:

\left[\begin{array}{ccc}5\\6\\7\end{array}\right]

In conclusion, AX=B is:

\left[\begin{array}{ccc}1&2&5\\1&1&1\\4&6&5\end{array}\right]*\left[\begin{array}{ccc}x1\\x2\\x3\end{array}\right]=\left[\begin{array}{ccc}5\\6\\7\end{array}\right]

7 0
4 years ago
Find the 4th term of a proportion whose 1st, 2nd, and 3rd terms are 5, 10, and 7 respectively
fomenos
12 is the 4th term? Dont quote me on that though. I am 90% sure.
6 0
3 years ago
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