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
EastWind [94]
3 years ago
7

Solve the system algebraically.y=3-1/2x3x+4y=1what is the value of x?

Mathematics
1 answer:
Gre4nikov [31]3 years ago
8 0
Use the expression for y in the second equation.
.. 3x +4(3 -(1/2)x) = 1
.. 3x +12 -2x = 1
.. x +12 = 1
.. x = -11
You might be interested in
What is the equation in point slope form of the point (2,-5) and (0,3)
Art [367]

7x-y-17=0

Step-by-step explanation:


3 0
3 years ago
HURRYYYYYYYYY!! What is the equation of the quadratic function with a vertex at (2, 25) and an x-intercept at (7,0)?
tangare [24]

Answer:

y=-(x-7)(x+3)

which is none of the choices provided.

Are you sure the question is right or even the choices?

You can even write it as:

y=-(x+3)(x-7) but this is still not a choice.

Step-by-step explanation:

The vertex form of a quadratic is y=a(x-h)^2+k.

This is called vertex form because it gives you the vertex is (h,k).

We are given that (h,k)=(2,25) which makes our equation:

y=a(x-2)^2+25.

We can find the value of a by plugging in the x-intercept (7,0) for (x,y) into:

y=a(x-2)^2+25

0=a(7-2)^2+25

0=a(5)^2+25

Subtract 25 on both sides:

-25=a(5)^2

-25=a(25)

Divide both sides by 25:

\frac{-25}{25}=a

-1=a.

So the equation for the quadratic is:

y=-1(x-2)^2+25

Let's put this into factored form since all the choices are in factored form.

This will require us to multiply the (x-2)(x-2) out:

y=-1(x-2)(x-2)+25

y=-1(x^2-2x-2x+4)+25

y=-1(x^2-4x+4)+25

y=-x^2+4x-4+25

y=-x^2+4x+21

Factor out -1:

y=-(x^2-4x-21)

WE need to find two numbers that multiply to be -21 and add to be -4:

y=-(x-7)(x+3)

8 0
3 years ago
Read 2 more answers
Selim puts 1 star sticker on each baseball card of his favorite players. The stickers come 9 to a sheet. Selim has 30 favorite p
irakobra [83]
4 sheets
Explanation
30 divided by 9 gives you 3.333333
But you can’t have 3 1/3 of a sticker sheet so you round up to 4 sheets
5 0
3 years ago
Read 2 more answers
It's possible to build a triangle with side lengths of 3, 3, and 9.<br> O A. True<br> O B. False
Svetllana [295]
Add up 3+3=6, number has to be bigger than 9 so the answer is false.
5 0
2 years ago
Determine which point is the solution to the given system.
lianna [129]

Answer:

WHAT UP

Step-by-step explanation:

DO THIS AND THAT LOL

5 0
2 years ago
Other questions:
  • 7388475694872+378496293
    13·2 answers
  • Charlene is wrapping the box below. How much wrapping paper will she need? A. 186 in.^2 B. 372 in.^2 C. 480 in.^2 D. 558 in.^2 P
    9·2 answers
  • Integrated circuits consist of electric channels that are etched onto silicon wafers. A certain proportion of circuits are defec
    5·1 answer
  • Find the GCF of the list below.<br> - 30x’y, 15xy360xy
    11·1 answer
  • In the graph, the vector terminating at A represents the complex number z. The vector terminating at B represents the product of
    8·2 answers
  • Write your answer as a whole number or a mixed number in simplest form. Include the correct unit in your answer.
    7·2 answers
  • A portion of the Quadratic Formula proof is shown. Fill in the missing statement. Statements Reasons x squared plus b over a tim
    15·2 answers
  • What is the following difference? 2ab * (root(3, 192a * b ^ 2)) - 5(root(3, 81a ^ 4 * b ^ 5))
    5·1 answer
  • Let R be the triangular region in the first quadrant with vertices at points (0,0), (a,0), and (0,b), where a and b are positive
    12·1 answer
  • What is the gradient of the graph shown?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!