MATHEMATICS HIGH SCHOOL

In which line is a mistake first made when solving the following system of equations by elimination for x? 5x + 3y = 12 4x - 5y = 17Line 1
25x + 15y = 60
4x - 5y = 17

Line 2
25x + 15y = 60
20x - 15y = 85

Line 3
45x = 145

Line 4
x = 29/9

Answers

Answer 1
Answer: - in the second line bc. the second equation we need multiplie just by 3 and ot by 5 
- so there above was multiplied by 5 and so than 5*(-5y) not equal -15y so this is equal -25y 

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Find the value of x that makes m parallel to n

Answers

Answer:

C. x = 24°

Step-by-step explanation:

(2x+36)° + 4x° = 180° (▼ coordinate angel)

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Which number is an irrational numberSquare root 100
1/8
-2.2675
3 square root of 16 ​

Answers

The decimal answer is the irrational number

Answer:

square root 100

3 square root of 16

A quadrilateral has vertices (-5,0), (2,8), (4,-5) and (7,3). Which matrix is the coordinate matrix for the given quadrilateral?

Answers

Answer:

The matrix that is the coordinate matrix of the given quadrilateral is:

A.\ \left[\begin{array}{cccc}-5&2&4&7\n0&8&-5&3\end{array}\right]

Step-by-step explanation:

We  know that the vertices of a quadrilateral are expressed in form of a matrix by placing the vertices along the column of a matrix.

i.e. the vertex A(-5,0) form the first column of a  matrix and similarly the vertex B form the second column of the matrix ; C from the third column of the matrix and D form the third column of the matrix.

          Hence, the answer is:

                      Matrix A
(-5,  2,  4,  7)
  0   8   -5  3

The co-ordinates are just rewritten in form of a column vector. This gives a  matrix of order 2x4

Find the distance between the two ponts rounding to the nearest tenth (if necessary)(3,6) and (1,9)

Answers

i think it is 3.6
hope this helps

What is -14.96 - 2.9.

Answers

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- 14.96 - 2.9 = - 17.86

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Answer: The answer is -17.86

Step-by-step explanation: When subtraction negative with a positive you all way have to see which number is greater. So in this case the number that is greater is -14.96 so you subtract 2.9 and you will get the answer of -17.86.

What is the minimum number of data points needed to use matrices to find an equation for a circle in the form 0=x^2+y^2+Dx+Ey+F0 = x 2 + y 2 + D x + E y + F?

Answers

The number of rows of a matrix is the number of data points of the matrix.

The number of data points is 3.

The equation is given as:

\mathbf{0 = x^2 + y^2 + Dx + Ey + F}

The number of unknown is the minimum number of data points.

From the equation, we have:

\mathbf{Unknown = D,E, F}

The number of unknown variable is 3

Hence, the number of data points is 3.

Read more about data points and matrices at:

brainly.com/question/19084291

Step-by-step explanation:

You need at least 3 points to define a circle.  By looking at the equation, you can see there are three unknown coefficients: D, E, and F.  Therefore, you must solve 3 equations, so you need 3 points.
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