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
Nataly [62]
3 years ago
6

X+y=4 X-3y=12 Graph?

Mathematics
1 answer:
AlekseyPX3 years ago
8 0
I'll solve it algebraically


x+y=4
x-3y=12

multiply first equatoin by -1 and add to second

-x-y=-4
<u>x-3y=12 +</u>
0x-4y=8


-4y=8
divide both sides by -4
y=-2

sub back

x+y=4
x+-2=4
add 2 to both sides
x=6

x=6
y=-2
(6,-2)
You might be interested in
5/2x+1/4=12 solve for x
aniked [119]

Answer:

4/5 (2x + 5) − 4 =1

4/5(2x +5) = 1 +4

4/5 (2x +5) = 5

2x + 5 = 5 / (4/5)

2x + 5 = 5 (5/4)

2x + 5 = 25/4

2x = 25/4 - 5

2x = 25/4 - 20/4

2x = 5/4

x = (5/4) / 2

x = (5/4) (1/2)

x = 5/8

x = 0.625

7 0
3 years ago
Read 2 more answers
Does anyone Know what y = 1.6x + 48?
mel-nik [20]

Answer:

49.6 is what y is equal to

Step-by-step explanation

6 0
3 years ago
Round 0.485 correct to 1 significant figure
yanalaym [24]

Answer:

0.5

Step-by-step explanation:

the first significant figure is the non zero

6 0
2 years ago
A, O and B lie on a straight line segment.
Helga [31]
180 is the degrees a straight line segment is. This means that
4x + 3x + 2x = 180.
Since these all have the same variable (x), then you can add the coefficients. (4,3,2)
9x = 180
180/9 = x

X = 20

6 0
3 years ago
Read 2 more answers
Y= - 2x + 4<br> 2x + y = 4
Tomtit [17]

Answer:

Infinite amount of solutions

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients
  • Coordinates (x, y)
  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define Systems</u>

y = -2x + 4

2x + y = 4

<u>Step 2: Solve for </u><em><u>x</u></em>

<em>Substitution</em>

  1. Substitute in <em>y</em>:                                                                                                  2x + (-2x + 4) = 4
  2. Combine like terms:                                                                                         4 = 4

Here we see that 4 does indeed equal 4.

∴ the systems of equations has an infinite amount of solutions.

7 0
2 years ago
Read 2 more answers
Other questions:
  • a baseball team has 13 players; how many possible batting orders can the coach make if there are 9 players in the batting lineup
    6·1 answer
  • Can a rational number be a repeating decimal? If so, give an example.
    10·1 answer
  • What is the distance, in radical form, between the points (4,6) and (8,-2)?
    14·1 answer
  • Turtle walked 1/8 of a mile in 1/2 of an hour. How many miles will the turtle wall in one hour?
    15·1 answer
  • PLEEEAAASEEEEE HHEEELPPPP MMEEEEEE
    6·2 answers
  • Jackie's dad drives her to a friend's house at the speed 30 mph. The friend's mom drives her back using the same route at the sp
    12·1 answer
  • The product of two posotive consecutive intergers is 132. Find the intergers.
    5·1 answer
  • HELPPPPP WILL GIVE BRAINLIEST
    12·1 answer
  • I need to do these 4 questions in math! ASAP please! Thank you so much! Will mark brainliest!
    9·1 answer
  • I have a question? can yall answer it please
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!