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
iren [92.7K]
3 years ago
10

What is the x-coordinate of the vertex of the parabola whose equation is y = 3x2 + 9x?

Mathematics
2 answers:
inn [45]3 years ago
8 0
Hello :
y = 3x²+9x
   = 3(x² + 3x )
   = 3 ( x² +2(3/2)x +(3/2)²) -(3/2)²)
   = 3((x+3/2)² -9/4)
y = 3 (x+3/2)² -27/4
<span>the x-coordinate of the vertex  is : - 3/2</span>
tekilochka [14]3 years ago
3 0

Answer:

\text{The x-coordinate of vertex of parabola is -1.5}      

Step-by-step explanation:

Given the equation of parabola

y=3x^2+9x

we have to find the x-coordinate of the vertex of the parabola.

The general form of equation of parabola is

ax^2+bx+c=0

The x-coordinate of the vertex of the parabola can be calculated as

h=\frac{-b}{2a}

Comparing the given equation with the general equation, we get

a=3, b=9, c=0

x-coordinate of the vertex of the parabola is

h=\frac{-9}{2(3)}=\frac{-3}{2}=-1.5

The x-coordinate of vertex of parabola is -1.5

You might be interested in
PLS ANSWER! Which movie has more consistent ages?
Alex

Answer:

I think B

Step-by-step explanation:

because their age group is 20-25 more of a constant age group

compared to 20-30

6 0
2 years ago
A football team has a total of 800 jerseys. There are 6 medium size jerseys. What is the percentage of medium size jerseys?
White raven [17]
0.75% is the answer to this question
5 0
2 years ago
In order for the parallelogram to<br> be a square, x = [?].<br> 4x + 17<br> 12x - 23
AfilCa [17]

Answer:

x = 5

Step-by-step explanation:

4x + 17 = 12x - 23

23 + 17 = 12x - 4x

      <u>40</u> = <u>8x</u>

       8      8

       5  =  x

5 0
2 years ago
Given that sin 28° ≈ 0.469, enter the cosine of a complementary angle.
Lena [83]

Answer:

29 i think not sure ill reach back to you if i find a positive answer

4 0
2 years ago
Please help lolllllllllllll
Goshia [24]
Answer: (look at paper)

3 0
2 years ago
Other questions:
  • Name the property that is illustrated in each equation
    5·1 answer
  • Please dont tell me the answer just explain it to me how to do it:Josie makes invitations for his aunt's stationary company.of a
    15·1 answer
  • I need help with number 5 please!
    10·1 answer
  • A Ferris wheel has a diameter of 80 meters. They want to make circular sign all over the inside surface of the wheel." For this
    14·1 answer
  • Help please!!!
    15·1 answer
  • (4x-7) x (10x^2+4x-2) = <br><br> Please Help
    8·1 answer
  • HELP!!! ILL MARK BRAINLYEST!
    12·2 answers
  • What is the equation of the line with slope 1/2 and passing through the point at (1,2)
    13·1 answer
  • Which of the following best describes the graph below?
    10·2 answers
  • If you get paid $15 an hour and you work 50 hours a week how much money do u make in a year
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!