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
mario62 [17]
3 years ago
5

Which domain restrictions apply to the rational expression?

Mathematics
1 answer:
Anton [14]3 years ago
6 0

It can either be the negative sign of the number by the x so it should either be 2 or -

You might be interested in
Pleasee help x.x 1. Solve the system by elimination-
patriot [66]
Q1. The answer is x = 1, y = 1, z = 0

<span>(i) -2x+2y+3z=0
</span><span>(ii) -2x-y+z=-3 
</span>(iii) <span>2x+3y+3z=5
</span><span>_________
Sum up the first and the third equation:
</span>(i) -2x+2y+3z=0
(iii) 2x+3y+3z=5
_________
5y + 6z = 5

Sum up the second and the third equation:
(ii) -2x-y+z=-3 
(iii) 2x+3y+3z=5
_________
2y + 4z = 2


(iv) 5y + 6z = 5
(v) 2y + 4z = 2
________
Divide the fifth equation by 2
(iv) 5y + 6z = 5
(v) y + 2z = 1
________
Multiple the second equation by -3 and sum the equation
(iv) 5y + 6z = 5
(v) -3y - 6z = -3
________
2y = 2
y = 2/2 = 1


y + 2z = 1
1 + 2z = 1
2z = 1 - 1
2z = 0
z = 0


-2x-y+z=-3
-2x - 1 + 0 = -3
-2x = -3 + 1
-2x = -2
x = -2/-2 = 1



Q2. The answer is x = -37, y = -84, z = -35

<span>(i) x-y-z=-8 
(ii) -4x+4y+5z=7 
(iii) 2x+2z=4
______
</span>Divide the third equation by 2 and rewrite z in the term of x:
(iii) x+z=2
z = 2 - x
______
Substitute z from the third equation and express y in the term of x:
<span>x-y-(2-x)=-8 
x - y - 2 + x = 8
2x - y = 10
y = 2x - 10
______
Substitute z from the third equation and y from the first equation into the second equation:
</span><span>-4x + 4y + 5z = 7 
-4x + 4(2x - 10) + 5(2 - x) = 7
-4x + 8x - 40 + 10 - 5x = 7
-x -30 = 7
-x = 30 + 7
x = -37
y = 2x - 10 = 2*(-37) - 10 = -74 - 10 = -84
z = 2 - x = 2 - 37 = -35</span>
8 0
3 years ago
Kathy has 3/4 a yard of fabroc. She needs 3/10 of a yard for each doll dress she makes. How many doll dresses can she make
marishachu [46]
Kathy can make 2 doll dresses
5 0
3 years ago
Which of the following lists the correct order in which the three religions were founded, from oldest to newest?
RoseWind [281]

Answer:

The answer to your question is Judaism, Christianity, Islam.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Can someone please help me on this ASAP!
kondaur [170]

Answer:

??????????????????????????

6 0
3 years ago
If you can walk 3 miles in an hour, how many miles can you walk in 30 minutes, given the
otez555 [7]
The answer is B.

60 minutes divided by 3 equals 20 minutes.
3 0
3 years ago
Other questions:
  • An automatic machine is set to fill bags of dog food with exactly 25 pounds on average with a standard deviation of 0.5 pounds.
    12·1 answer
  • Toni can carry up to 18 pounds in her backpack her lunch where is 1 pound her gym clothes way to pounds in a box weighed 3 pound
    10·1 answer
  • NEED HELP ASAP . SERIOUS ANSWERS .
    9·1 answer
  • How many solutions does the system have?<br> y = -2x - 4<br> ly=3x +3
    8·2 answers
  • I need help can you help me please
    5·2 answers
  • Which of these are a litre unit:<br> Capacity, Mass, Density or Area?
    13·2 answers
  • In 1999, the student enrolment at a college was 13% more than it was in 1998. If the enrolment was 36,612 in 2000, which was 8%
    11·1 answer
  • Enter the difference as a mixed number
    11·2 answers
  • ___im gæ<br> A no<br> B yes <br> C maybe <br> D leave it blank
    8·2 answers
  • Find the Value of X.<br> Solve for X
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!