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belka [17]
3 years ago
13

Enter an algebraic equation for the sentence. Use x as your variable.

Mathematics
1 answer:
Studentka2010 [4]3 years ago
6 0

Answer:

Step-by-step explanation:

Represent the number by x.  Then:

9x - 4 = 23

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Solve the following systems of equations
Varvara68 [4.7K]

Answer:

(-1;1) and (0;4)

Step-by-step explanation:

First of all, even if the system is of 4th degree, by looking at the shape of the equations I am expecting up to 2 solutions.

The easiest way to solve it, since both equation are in the form y= something, is to equate both RHSs.

3x^2+6x+4=-3x^2+4\\6x^2+6x=0 \rightarrow 6x(x+1)=0

which tells us that either x=0 or x=-1

Now we can replace these value of x in one of the two to finish our work: x=0\rightarrow y= 4

x=-1 \rightarrow y= -3+4=1

6 0
1 year ago
Which symbols correctly relate the two numbers?
geniusboy [140]
I can see the numbers
4 0
3 years ago
Answer quickly only if you know ​
Neko [114]
The figure has 5 sides, so it must be a pentagon. Pentagon’s interior angles sum up to 540°.

Therefore:

132+90+3x=540

222+3x=540

3x=318

x=106

Checking work, where x=106

222+3(106)=540.

So x°=106°
7 0
2 years ago
What is the determinant of the coefficient matrix of the system {4x+3y+2z=0 -3x+y+5z=0 -x-4y+3z=0
slava [35]

Answer:

  130

Step-by-step explanation:

You want the determinant of the matrix ...

  \left[\begin{array}{ccc}4&3&2\\-3&1&5\\-1&-4&3\end{array}\right]

One way to figure it is as the difference between the sum of products of the down-diagonals and the sum of products of the up-diagonals:

  D = (4)(1)(3) +(3)(5)(-1) +(2)(-3)(-4) -(-1)(1)(2) -(-4)(5)(4) -(3)(-3)(3)

  = 12 -15 +24 +2 +80 +27

  D = 130

The determinant of the coefficient matrix is 130.

_____

Many scientific and graphing calculators and web sites can perform this calculation for you.

7 0
3 years ago
This rectangle is half as wide as it is long what is the perimeter of the rectangle
kramer

length=4 cm width=2 cm

4(2)+2(2)=12

7 0
3 years ago
Read 2 more answers
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