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
kati45 [8]
3 years ago
5

One root of the equation x2+6x+q=0 is twice the other root. find q and the roots.

Mathematics
1 answer:
Whitepunk [10]3 years ago
8 0
Suppose one of the roots is a the second is 2a. The factors will be:
(x-a) and (x-2a)
thus
(x-a)(x-2a)=x^2+6x+q
x^2-xa-2ax+2a^2=x^2+6x+q
taking corresponding terms we shall have:
-2ax=6x
solving for a we get
-2a=6
thus
a=-3
but
q=2a^2
substituting the value of a we get:
q=2(-3)^2
q=2*9
q=18
You might be interested in
Ethan works in a department store selling clothing. He makes a guaranteed salary of $500 per week, but is paid a commision on to
ElenaW [278]

The total amount of money Ethan made in a week including commission is $812.5

<h3>Total income</h3>

  • Total sales for the week = $1250
  • Base salary = $500
  • Percentage commission = 25%

Amount of commission earned = 25% of $1250

= 25/100 × $1,250

= 0.25 × 1250

= $312.5

Total earnings = Base salary + Amount of commission earned

= $500 + $312.5

= $812.5

Learn more about income:

brainly.com/question/13793671

#SPJ1

3 0
2 years ago
Which equation represents a line that passes through the two points in the<br> table?
jekas [21]

Answer:

C. y - 5= 5/3 ( x - 3 )

Step-by-step explanation:

I used a graphing calculator

5 0
3 years ago
What is the domain of the function graphed below???? PLEASE HELP
Agata [3.3K]
You need to look at the x values when you calculate that.

There is a line which goes from -2 to 0. Another line at 0 to 4 and the last line is 7 to infinity.

You can combine the first two and get B) (-2, 4] and [7, infinity)
6 0
3 years ago
Read 2 more answers
Four more than half of the students in Bryan’s homeroom have tickets to attend the school’s musical. 20 students have tickets. S
vlabodo [156]

Answer:

<h2>The option B and D are the equations.</h2>

Step-by-step explanation:

Let, the total number of students are x.

The number of students having the ticket is 4 + \frac{x}{2}.

It is given that the number is 20.

Hence, 4 + \frac{x}{2} = 20\\4 = 20 - \frac{x}{2}.

Option B is the equation.

Option D is also the same.

The difference is just, the variable is wriiten in the other side.

4 0
3 years ago
Please help me to solve it
Phantasy [73]

What are you trying to solve for?

4 0
3 years ago
Read 2 more answers
Other questions:
  • the brunch buffet cost the same for each adult. for the family of 8 the total cost was 272 how much did it cost per person
    10·1 answer
  • Every week, Mr. Kirkson uses 3/16 gallon of water to water every 1/3 square foot of his garden.
    14·1 answer
  • Find the probability of each compound event
    12·1 answer
  • Which trigonometric ratios are correct for triangle ABC?
    14·1 answer
  • True or False
    9·1 answer
  • PLS PLS HELP! WILL GIVE BRAINLIEST IF ALL QUESTIONS ARE ANSWERED AND IF THEY’RE RIGHT!
    15·1 answer
  • Can someone help me with this question please. I've been struggling.
    7·1 answer
  • Will give brainliest
    14·1 answer
  • A student can pitch a fast ball at 65 miles per hour. Convert this
    6·2 answers
  • The marital status distribution of the U.S. male population, ages 15 and older, is as follows: 35.4% never married, 53.6% marrie
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!