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
stepan [7]
2 years ago
15

Solve the system of linear equations by substitution 12x+y=−4 y=2x+16

Mathematics
1 answer:
ki77a [65]2 years ago
8 0

Answer:

Your solution is (-10/7, 92/7)

Step-by-step explanation:

12x + y = -4

y = 2x + 16

To use substitution, we want to plug one variable's equation into the other equation.

We can see that y is already solved for us. Plug y into the first equation.

12x + y = -4

12x + (2x + 16) = -4

Combine like terms.

14x + 16 = -4

Subtract 16 from both sides.

14x = -20

Divide both sides by 14.

x = -20/14

x = -10/7

Now that we know x, we will plug it into one of the other equations.

y = 2x + 16

y = 2(-10/7) + 16

Multiply.

y = -20/7 + 16

Add.

y = -20/7 + 112/7

y = 92/7

Your solution is (-10/7, 92/7)

Hope this helps!

You might be interested in
Worth 10 points please help me ASAP
Nitella [24]
(2,-2) would be the answer I think
8 0
2 years ago
A total of 243 adults and children are at a movie theater. There are 109 more adults than children in the theater. If eh represe
Marina86 [1]
The system should look like this:

eh + b = 243
eh - b = 109
6 0
3 years ago
The graph of f(x) is shown. What is the value of f (x) when x= -2?
Elden [556K]
C. 3.5
You have to go to -2 on the “X axis” and find the corresponding “Y” value on the line.
7 0
3 years ago
Q. If A is a square matrix such that A² = A, then write the value of 7 A −(I + A)³, where I is an identity matrix.​
andriy [413]

Answer:

7A−(I + A)³

=7A−(1³ + A³ +3.I.A² +3.1².A)

=7A−(I+ A².A+3A² +34)

= 7A-(I+A.A+3A+34) (*: A² = A)

=7A-(I+ A² +6A)

= 7A-(I+A+64)

=7A-(1+7A)

=7A-I-7A

=-1

6 0
2 years ago
Y=1/3x + 2 what is the domain?
Trava [24]

Answer:

To find the domains you must graph this equation and find the x-coordinates of the points plotted. That's the domain.

Remember, if two points have the same x-coordinate then do not repeat the number when stating the domain. Domain also always must be written in the least to greatest order. Domains must be written with {} enclosing them.

So if the x-coordinates were 4,5,6,4,7,5

You would write the domain as {4,5,6,7}

5 0
3 years ago
Read 2 more answers
Other questions:
  • Factor completely. y^2+6y+8
    7·1 answer
  • State if the polygons are similar
    9·1 answer
  • 2. Point A is located at (-8, -3) on the coordinate grid. If it is
    5·1 answer
  • If ƒ(x) = 2x, then ƒ -1(x) =<br> -2x<br> ½x<br> x - 2
    8·1 answer
  • Help please!! would appreciate it ​
    5·1 answer
  • PLEASE HELP!!!! <br> Find m
    7·1 answer
  • A 5-foot peice of ribbon cost 13.20 dollars. WHAT is the price per inch
    15·1 answer
  • Find the area of the triangles with
    14·1 answer
  • A polygon has 50 sides
    10·2 answers
  • My question is the picture​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!