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
Leviafan [203]
3 years ago
14

 Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. Find

all solutions whenever they exist.
X + 3y = 9
 

3x –y =  7
Mathematics
1 answer:
Blababa [14]3 years ago
4 0
After\ adding\ equations\ and\ simplifying:\\\\One\ solution:\\\\x=number\\ example: x=2\\\\ infinitely\ many\ solutions:\\\\ Left\ side=\ Right\ side\\ example:\\ 2=2\\\\ No\ solutions:\\\\2 \neq 5\left \{ {{x+3y=9} \atop {3x-y=7}\ \ |*3} \right.\\\\ \left \{ {{x+3y=9} \atop {9x-3y=21}} \right.\\+--------\\\\Addition\ method:\\\\10x=30\ \ |:10 \\\\x=3\\\\x+3y=9\\\\3y =9-x=9-3=6\\\\y=2\\\\ \left \{ {{y=2} \atop {x=3}} \right.
You might be interested in
The circumference of the inner circle is 66 ft. The distance between the inner circle and the outer circle is 44 ft. By how many
Ray Of Light [21]

Answer:

  276 4/7 ft

Step-by-step explanation:

Let r1 represent the radius of the inner circle. Then its circumference in feet is ...

  C = 2πr

  66 = 2π(r1)

If the radius of the outer circle is (r1 +44), then its circumference is ...

  C = 2π(r1 +44) = 2π(r1) +2π(44)

  C = 66 +88π

Then the difference in the circumferences is ...

  (66 +88π) - (66) = 88π

Using the given value of π, the difference in circumferences is ...

  (88 ft)(22/7) = 1936/7 ft = 276 4/7 ft

6 0
3 years ago
Which expression shows (3*100)+(5*10)+(5*1/10) in standard form?​
Ivenika [448]

Answer:

Step-by-step explanation: 3 x 100 + 4 x 10 + 5 x 1 Standard form is the reverse ...

7 0
3 years ago
What is plane z in this image
denpristay [2]

Answer:

the left side of the line

Step-by-step explanation:

6 0
3 years ago
The expression p/x^2 - 5x +6 simplifies to x+4/x-2. Which expression doees p represent?
gladu [14]
We know that
(ad)/(bd)=d/d time a/b=a/b since d's cancel
also
if a/b=c/d in simplest form, then a=c and b=d

we have
p/(x^2-5x+6)=(x+4)/(x-2)
therefor

p/(x^2-5x+6)=d/d times (x+4)/(x-2)
p/(x^2-5x+6)=d(x+4)/d(x-2)

therefor
p=d(x+4) and
x^2-5x+6=d(x-2)

we can solve last one
factor
(x-6)(x+1)=d(x-2)
divide both sides by (x-2)
[(x-6)(x+1)]/(x-2)=d
sub


p=d(x+4)
p=([(x-6)(x+1)]/(x-2))(x+4)
p= \frac {(x-6)(x+1)(x+4)}{(x-2)}

7 0
3 years ago
Lana wants to buy a hamster. The hamster is on sale for 19% off. Lana has a coupon as well. The coupon is for 15% off. What is t
son4ous [18]

Answer:

$42 - 19 = 23 - 15 = $8

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • Suppose you are climbing a hill whose shape is given by the equation z = 1400 − 0.005x2 − 0.01y2, where x, y, and z are measured
    14·1 answer
  • Separate the x- and y-values with a comma.<br> X=-3+y<br> 26x - 5y = 6
    14·1 answer
  • Help me plz
    13·2 answers
  • Find two numbers, if … c Their sum is 3/5 and their difference is 7 1/5
    11·1 answer
  • What is the mode of the following data values? 54, 78, 36, 46, 36
    12·2 answers
  • PLEASE NEED HELP ASAP TYTY I WILL BE GIVING THANKS!
    15·1 answer
  • Each unit cube measured 1 inch3. what is the maximum volume of the prims
    5·1 answer
  • Which one is it? for a grade &amp; due today!! help me please
    10·2 answers
  • Plsss help mee quickkk !!
    11·2 answers
  • (4x – 3) + (–x + 5) =
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!