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
fomenos
3 years ago
13

Solve the following system of equations and show all work. y = 2x^2 +9x y = 4x + 25

Mathematics
1 answer:
Genrish500 [490]3 years ago
7 0

Answer:

x = 5/2 thì y = 35 và x = -5 thì y = 5

Step-by-step explanation:

thay y = 4x + 25 vào phương trình y = 2x ^ 2 + 9x ta có:

4x + 25 = 2x ^ 2 + 9x

⇒2x ^ 2 + 5x - 25 = 0

⇒ x = 5/2 và x = -5

thay x = 5/2 vào phương trình y = 4x + 25 ⇒ y = 4*(5/2) + 25 = 35

thay x = -5 vào phương trình y = 4x + 25 ⇒ y = 4*(-5) + 25 = 5

You might be interested in
And remember the little $4308 pizza-mistake? How many weeks would you have
Sati [7]
The answer would be 331 weeks rounded. Just divide.
5 0
3 years ago
Help me please help
solniwko [45]

Answer:

I think its c I'm not sure

4 0
3 years ago
Geometry Math
Lostsunrise [7]

Answer:

Step 3: The measure of angle DAB is 60°. Reason: Since DAE is a right angle, and EAB is 30 degrees, 90 - 30 is 60. (Just find the reason that is related to this statement).

Step 4: The measure of angle ABC is 130°. Reason: Same-side Interior Angles Theorem

Step-by-step explanation:

6 0
3 years ago
Please help me<br> Solve for x.<br> a) 30<br> b) 27<br> c) 33
OlgaM077 [116]

Answer:

x = 27

Step-by-step explanation:

The angle at any point on a straight line is 180 degrees.

The middle line over there is creating a right angle which is 90 degrees.

This must mean that both sides are 90 degrees.

3x+9 = 90

3x = 81

x = 27

4 0
3 years ago
Please help me this is due today
Serjik [45]

Answer:

1. 15 (A)

2. 12 (G)

Step-by-step explanation:

1.  We can make an equation out of this...

    3x+3=48

    x is the age of Geoff which is what we are trying to find out

   

    We have to add 3 to both sides of the equation

    3x+3=48

         -3   -3

     ________

    we end up with 3x=45

     we then have to divide 3 by both sides because its the opposite of                

     multipling

    3x=45

    _____

         3

    we get x=15

2.   We can write a problem statement  

      (2 x 9)-6=?

       multiply 2 and 9 <u>FIRST</u>

     

       18-6=?

       your answer is 12

      Your Welcome! Have a great rest of your day! :)

 

       

     

7 0
3 years ago
Other questions:
  • A survey of a group of seventh graders and a group of teachers at a local middle school asked how many siblings they each have.
    12·2 answers
  • 4x+3y-2(x to the second power +3) x=4 y=6
    5·2 answers
  • Name the algebraic property demonstrated in the example below:
    7·2 answers
  • Choose the fragment that best completes the following sentence. Interest charges will not be applied to a credit card when-
    13·2 answers
  • Emma has 18 yellow flowers and 27 white flowers she wants to split them into vases in equal groupes what is the largest number o
    13·1 answer
  • Based on the abbreviations, translate the following ads into fully spelled-out sentences. The final sentence should state how ma
    6·2 answers
  • 25% of what number is 13
    15·2 answers
  • 2. -3n(2n – 5) = 0
    15·2 answers
  • What type of triangle is this ?
    9·1 answer
  • Three Step Linear Equations<br><br> Solve for x<br> 8x+5=-6x+3
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!