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earnstyle [38]
3 years ago
6

X + 3y + 2z = 7

Mathematics
2 answers:
omeli [17]3 years ago
7 0

Step-by-step explanation:

x + 3y + 2z = 7

2x − y + z = 9

-x + 4y + 5z = 14

First add the first and third equations to eliminate x.

7y + 7z = 21

Simplify:

y + z = 3

Solve for y:

y = 3 − z

Substitute into the first two equations:

x + 3(3 − z) + 2z = 7

2x − (3 − z) + z = 9

Simplify:

x + 9 − 3z + 2z = 7 → x − z = -2

2x − 3 + z + z = 9 → 2x + 2z = 12 → x + z = 6

Add the equations to eliminate z.

2x = 4

x = 2

Therefore, z = 4 and y = -1.

Ann [662]3 years ago
5 0
Just use photomath that’s easier
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PolarNik [594]

Step-by-step explanation:

E

working ;

(3x+2)^2

*Apply Perfect Square Formula : (a+b) =a^2+2ab+b^2

a = 3x,b = 2

(3x)^2 + 3x.2+2^2

finally Answer is:

= 9x^2 + 12x +4

5 0
3 years ago
Lura’s chocolate bar is 71% cacoa. If the weight of the chocolate bar is 58 grams, how many grams of cocoa does it contain? Roun
gtnhenbr [62]
58*0.71= around 41.2 grams of coco. This is because we can multiply to get this.

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4 0
2 years ago
Use Gauss-Jordan elimination to nd the general solution for the following system of linear equations: z2 + 3z3 ???? z4 = 0 ????z
nirvana33 [79]

Answer:

Step-by-step explanation:

Solution is attached below

6 0
3 years ago
What is the value of x?
Vilka [71]

Answer:

x = 58

Step-by-step explanation:

The angle formed by two secants = 1/2(difference of intercepted arcs)

51 = 1/2 (160 - x)

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6 0
3 years ago
In the expression what is the numerical coefficient in this question ?
bearhunter [10]

Answer:

-7

Step-by-step explanation:

The numerical coefficient of - 7yz^2 is - 7.

4 0
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