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Luba_88 [7]
3 years ago
13

Trying this again for another 30 point and brainly

Mathematics
2 answers:
ki77a [65]3 years ago
5 0

Answer:

10

Step-by-step explanation:

olga nikolaevna [1]3 years ago
3 0

The red square means the two outside lines form a right angle which equals 90 degrees.

10x + 16 + 54 = 90

Simplify:

10x + 70 = 90

Subtract 70 from both sides

10x = 20

Divide both sides by 10:

X = 2

The answer is x = 2

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fgiga [73]
I'd say centimeters, if that's what you're looking for. Maybe 1-2 cm.
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4 years ago
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¿Cuál dígito debe ir en el recuadro para
Keith_Richards [23]

Answer:

7

Step-by-step explanation:

English:

Which digit should go in the box to

make the next number divisible

between 2, 3 and 9? 8 ,? 48

Let x be the number, then the number will look like this:

8x48

This number is already divisible by 2, because it ends with an even number.

Now we need to check for divsibility by 3.

For this to be divisible by 3, the sum of the digit should be a multiple of 3.

8 + x + 4 + 8 = x +20

We know if a number is divsible by 9, it is also divsible by 3.

So

x + 20=9,18,27,....

The least positive solution is

x + 20 = 27

x = 27 - 20

x = 7

Therefore 8748 is divsible by 2,3, and 9.

4 0
3 years ago
Matrices A and B are square matrices of the same size. Prove Tr(c(A + B)) = C (Tr(A) + Tr(B)).
alexira [117]

Answer with Step-by-step explanation:

We are given that two matrices A and B are square matrices of the same size.

We have to prove that

Tr(C(A+B)=C(Tr(A)+Tr(B))

Where C is constant

We know that tr A=Sum of diagonal elements of A

Therefore,

Tr(A)=Sum of diagonal elements of A

Tr(B)=Sum of diagonal elements of B

C(Tr(A))=C\cdot Sum of diagonal elements of A

C(Tr(B))=C\cdot Sum of diagonal elements of B

C(A+B)=C\cdot (A+B)

Tr(C(A+B)=Sum of diagonal elements of (C(A+B))

Suppose ,A=\left[\begin{array}{ccc}1&0\\1&1\end{array}\right]

B=\left[\begin{array}{ccc}1&1\\1&1\end{array}\right]

Tr(A)=1+1=2

Tr(B)=1+1=2

C(Tr(A)+Tr(B))=C(2+2)=4C

A+B=\left[\begin{array}{ccc}1&0\\1&1\end{array}\right]+\left[\begin{array}{ccc}1&1\\1&1\end{array}\right]

A+B=\left[\begin{array}{ccc}2&1\\2&2\end{array}\right]

C(A+B)=\left[\begin{array}{ccc}2C&C\\2C&2C\end{array}\right]

Tr(C(A+B))=2C+2C=4C

Hence, Tr(C(A+B)=C(Tr(A)+Tr(B))

Hence, proved.

5 0
4 years ago
Round the number 33 and 89
trapecia [35]
33 rounded to the tens place would be 30.
89 rounded to the tens place would be 90.
5 0
3 years ago
Read 2 more answers
What is the domain of the function y= (square root) x+6-7
nikklg [1K]

Answer:

the third choice.  x>_-6

Step-by-step explanation:

1. When you have the square root of (x+6), it shifts the graph 6 units to the left.  

2.  So the x values would start and include -6 and continue growing to the right.

3. So the domain (x values) of the equation is x is greater than or equal to -6

4 0
3 years ago
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