1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Oksana_A [137]
3 years ago
8

What is the solution to the following system? X+2y+z=9 X-y+3z=13 2z=10

Mathematics
1 answer:
Vinvika [58]3 years ago
5 0

Answer:  x = 0; y = 2; z = 5

Step-by-step explanation:

x+2y+z=9

x-y+3z=13

2z=10

==

Start with the last equation:  2z = 10, therefore z = 5 [easy]

Let's rewrite the second equation with 1) z=5, and 2) rearrange to find x:

x-y+3z = 13

x - y +3*5 = 13

x = y-2

Now use the values for x [(y-2)] and y [5] in the first equation:

X+2y+z=9

(y-2) +2y + 5 = 9

3y +3 = 9

3y = 6

y = 2

Now that we have y [2] and z [5], let's use the first equation to solve for x:

x+2y+z=9

x + 4 + 5 = 9

x + 9 = 9

x = 0

====

Try the three values (x=0, y=2, and z=5) in any of the formulas.  The result should/will equal the number shown.

You might be interested in
Convert 0.34% into a decimal
WINSTONCH [101]
0.0034, This should be the decimal
7 0
3 years ago
Read 2 more answers
How do I solve fo A when A/2m=9+H
Neko [114]

Answer:

Step-by-step explanation:

Simply multiply 2m both sides:

A = (9+H)(2m)

Hope this helps!

4 0
3 years ago
Read 2 more answers
The diagram below shows twelve 30-60-90 triangles placed in a circle so that the hypotenuse of each triangle coincides with the
julia-pushkina [17]

Answer:

m+n = 337

Step-by-step explanation:

Lets start from the first triangle, It is given to be as 30-60-90.

The hypotenous of first rectangle be 2x, then other sides are by default x and

\sqrt{3}(x) , using laws of trigonometry.

(sin(30) = 0.5  and cos(30) = \frac{\sqrt{3}}{2})

The perimeter of first triangle is ,

= 2x + x + \sqrt{3}(x) = x(3+\sqrt{3}) = \sqrt{3}x(1+\sqrt{3})

Now, for second triangle, the longer leg is 2x, and similarly again,

other 2 sides are \frac{2x}{\sqrt{3}}  and \frac{4x}{\sqrt{3}}.

Again the perimeter of triangle comes out as,

= \sqrt{3}(x)(1+\sqrt{3})(\frac{2}{\sqrt{3}})

Thus, the repeating pattern is identified. The consecutive perimeters differ by, multiplying by factor \frac{2}{\sqrt{3}}

Thus, we can say that perimeter of 4th triangle is,

= (\frac{2}{\sqrt{3}})^{3}(X), where X is the repeating constant.

And of 12th triangle is,

= (\frac{2}{\sqrt{3}})^{11}(X),

Evaluating the above ratio, we get,

= \frac{81}{256}

Thus, m =256 and n=81.

Thus, m+n = 256+81 = 337.

6 0
3 years ago
Show steps and answer for this fraction .
Olenka [21]

-5 + i / 2i
-5 + i (2i) / 2i (2i)
-10i + i^2
i^2 - 10i
4 0
4 years ago
How many lines of symmetry does the infield of a baseball field have?
Gnesinka [82]
The inside of the feild has 4 lines if symmetry

7 0
4 years ago
Other questions:
  • 11, 8, 10, 10, 10, 9, 4, 9, 7, 5, 11, 8, 9, 11, 10, 10, 10, 9, 10 in chronological order
    5·2 answers
  • 100,000 less than five hundred sixty thousand, three hundred thirteen
    10·1 answer
  • If △AED and △CED are both right triangles, what triangle congruence could be used to prove that the two triangles are congruent?
    10·2 answers
  • How to write 69.541273 million in expanded form
    13·1 answer
  • Sara drives 72 miles on 3.2 gallons of gas. she uses this information to calculate how many miles per gallon she can drive. usin
    11·2 answers
  • Please help me I will give brainliest
    12·1 answer
  • It takes Paresh 4 hours to bike 26 miles. He plans to bike 7 hours tomorrow. If he bikes at the same rate, how far will Paresh b
    7·2 answers
  • During the first two weeks at his new job Damian earned a total of $500 he earned x dollars during the first week during the sec
    15·1 answer
  • The ratio of boys to girls at a movie is 4:7 If there are 21​ girls,How many boys are there
    14·2 answers
  • Help pls I will give brainlyst
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!