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
dem82 [27]
3 years ago
6

Select all of the following that are quadratic equations.

Mathematics
1 answer:
deff fn [24]3 years ago
7 0
What you want to do is solve all of these so that it equals to 0 on one side. The ones that are a quadratic will have x^2

x^2 - 2x = 4x + 1
x^2 - 6x - 1 = 0
Yes this is a quadratic

x^3 - 6x^2 + 8 = 0
No this is not a quadratic because the highest power of x is to the power of 3

5x - 3 = 0
No it is not a quadratic because it does not have x^2

2x^2 + 12x = 0
Yes because there's x^2

5x - 1 = 3x + 8
2x - 9 = 0
No because no x^2

9x^2 + 6x - 3 = 0
Yes because there's x^2
You might be interested in
(5x-6)(-x+4) using the box method
Sophie [7]

Answer:

-5x²+26x-24

Step-by-step explanation:

(5x-6)(-x+4)

=5x(-x+4)-6(-x+4)

=-5x²+20x+6x-24

=-5x²+26x-24

4 0
2 years ago
Tell which number is greater.<br> 11. 0.12, 1.2%
Tatiana [17]
0.12 because it equals to 12% where 1.2% equals to 0.012
4 0
2 years ago
Read 2 more answers
How many months until they price is the same in 22 + 24.50x = 47 + 18.25x
solmaris [256]
I think 89 I don’t know why I am just guessing
8 0
3 years ago
The terminal velocity of a person falling through air is about 100Km/hr. The acceleration due to gravity is 10ms−2. Use this inf
Aleonysh [2.5K]

The question here is how long does it take for a falling person to reach the 90% of this terminal velocity. The computation is:

The terminal velocity vt fulfills v'=0. Therefore vt=g/c, and so c=g/vt = 10/(100*1000/3600) = 36,000/100,000... /s. Incorporating the differential equation shows that the time needed to reach velocity v is 

t= ln [g / (g-c*v)] / c. 

With v=.9 vt =.9 g/c,

t = ln [10] /c = 6.4 sec.

8 0
3 years ago
Write an exponential function in the form y=ab^xy=ab
Zarrin [17]

Answer:

Step-by-step explanation:

y=ab^x\\x=0,y=4\\4=ab^0\\4=a(1)\\a=4\\y=4b^x\\x=2,y=256\\256=4b^2\\b^2=\frac{256}{4} =64\\b=\pm8\\y=4(8)^x\\or\\y=4(-8)^x

8 0
2 years ago
Other questions:
  • Orthographic projection and isometric projection are two ways to show three-dimensional objects in a two-dimensional space, such
    12·1 answer
  • My answer is 5.11<br><br> Correct ?
    5·2 answers
  • How do I factor this polynomial by grouping?<br> 2x^2 - 13x + 20
    15·2 answers
  • If pentagon ABCDE is rotated 180° around the origin to create pentagon A'B'C'D'E', what is the ordered pair of point A'?
    11·1 answer
  • What is the value of x?<br><br> x= ??
    10·1 answer
  • PLEASE HELP I GIVE THANKS
    10·1 answer
  • In which quadrants of the coornate plate is the shred region of the graph located?
    6·1 answer
  • Sorry if this is a lot. It’s true of false.
    7·1 answer
  • The box-and-whisker plot below represents some data set. What is the value of the third quartile?
    14·1 answer
  • The company XYZ bought property for OMR 600,000 on 1 January 2017. The land element of the purchase was OMR 100,000. The expecte
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!