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
Alex Ar [27]
3 years ago
11

Which is a zero of the quadratic function f(x)=9x^2-54x-19?

Mathematics
1 answer:
Arturiano [62]3 years ago
8 0
A zero, or a solution of the quadratic function is c) x = 6 1/3


Write -54x as a difference
9x^2 + 3x - 57x - 19

Factor 3x out
{ 9x^2 + 3x }  - 57x - 19
3x (3x + 1)

Factor -19 out
3x (3x + 1) -19 (3x + 1)

Group the equations
( 3x - 19 ) ( 3x + 1 )

Solve for the zeroes

(3x+1) = 0
     -1     -1
3x = -1
3x / 3 = x
-1 / 3 = -1/3
x = - 1/3

(3x - 19) = 0
      +19   +19
3x = 19
3x / 3 = x
19 / 3 = 6 1/3
x = 6   1/3

You might be interested in
The cost of a concert ticket last week was $50.00. This week a concert ticket is $55.00. The percent increase of the ticket from
marta [7]

Answer:

110% pls give brainliest

Step-by-step explanation:

4 0
2 years ago
Can y'all plz help me with this ​
schepotkina [342]

Answer:

It's rise/run.

May or not be right but I hope it helps!

I added the attachment.

6 0
3 years ago
Marcus changed jobs after college. His old salary was $48000 per year. Now his new salary is 37% more per year. What is his new
spayn [35]

Answer:

65,760

Step-by-step explanation:

move decimal over two places to make a percent a decimal so .37

then multiply that times the 48000 to get 17,760 and then add that to the original 48000 to get 65,760

8 0
2 years ago
1+14554345555556675566669877
zhenek [66]
<span>14554345555556675566669878 is your answer.

All you have to do when adding 1 is add the number at the very end of the number +1. 

It's quite easy.

Glad I could help, and good luck!


</span>
8 0
3 years ago
Read 2 more answers
Which decimal is less than 2.5?
7nadin3 [17]
1 is D
2 is A
3. is B
4. is D
5. is C
6 0
3 years ago
Other questions:
  • This table shows the data for murders by firearms and murders by “other” weapons in 10 states. 
    8·1 answer
  • What is the perpendicular for x+4y= -2
    13·1 answer
  • I NEED HELP WITH THIS ASAP!! Please!
    12·1 answer
  • 3. The length of a living room is 12 feet and its width is 10.5 feet. The length of the room is being
    6·1 answer
  • What conclusion can you make about the result of adding a rational and an irrational number?
    15·2 answers
  • Which algebraic expression is represented by the model?
    14·1 answer
  • Plz asap surface area and volume of this shape
    11·1 answer
  • Tyler has $540 to spend at a bicycle store for some new gear and biking outfits. Assume all prices listed include tax. He buys a
    14·1 answer
  • In ΔQRS, r = 89 inches, s = 32 inches and ∠Q=116°. Find ∠R, to the nearest degree.
    6·1 answer
  • 12. Triangle ABC is shown on the coordinate plane. If it is translated 4 units to the left and 3
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!