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
14. Thomas is building a fence around his
Black_prince [1.1K]

Answer:

18 meters

Step-by-step explanation:

4 cm = 6m

2cm = 3m

6x3=18

Please <3 my Answer B )

4 0
2 years ago
Read 2 more answers
G(x) = (two-thirds) Superscript x – 2?
snow_tiger [21]

Answer:

-1 1/3

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The value of 3 sqrt x^10, when x=-2, can be written in simplest form as a^3sqrtb, where a -8 and b=
igor_vitrenko [27]

Answer:

A=-8,b=-2

Step-by-step explanation:

I toke test on eden

5 0
3 years ago
Please ignore my work. Can you please solve and show all work, thanks
valina [46]

Answer:

Answer is (1): 2 times (x^2 -13)

Step-by-step explanation:

Using the FOIL method, you can conclude that (x-5)(x+5) is X^2 -5x +5x -25. Since the two middle terms cancel, you are left with X^2 -25. For the right side of the equation, (x-1)(x+1), using the FOIL method gets you x^2 -x +x -1. Once again, the -x and x cancel out and you end up with X^2 -1. To add both of these together, you can get rid of all parentheses and do the work. Two x^2 added together is 2X^2, and -25-1 is negative 26. After this, you end up with 2x^2 -26. To get to your final answer you need to take out the GCF of both terms, (the largest number that can go into 2x^2 and -26), which is 2. Taking the two out leaves us with 2(x^2 -13), which is your final answer. It looks like you were on the right track.

FOIL Property

Multiply first terms

Then Outside terms

Then inside terms

Then the last terms

Hope this helps!

3 0
3 years ago
Help.pls it is urgent. ​
il63 [147K]

Answer:

b=50

c=28

a=16

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • A sphere has a radius of 5.3 ft. What is the volume of the sphere to the nearest tenth? use 3.14 for pi. Question 3 options:
    15·1 answer
  • A white rabbit mates with a black rabbit the offspring is gray in color what type of heredity is this
    7·1 answer
  • Determine whether line AB and line CD are parallel, perpendicular, or neither. A( 4, 2), B(-3, 1), C(6, 0), D(-10, 8)
    14·1 answer
  • How to graph y=7x-1 using the y
    5·1 answer
  • How much would $200 invested at 4% interest compounded every 6 months be worth after 5 years?
    7·1 answer
  • Is this a linear function?
    12·2 answers
  • Please help I have been stuck this for a while
    6·1 answer
  • Marking brainliest <br><br> Pls help
    15·2 answers
  • If money in a savings account earned 8% interest per annum, how much nterest would be earned on $150.00 over three years?
    11·1 answer
  • 5/3 divided by (-6/7).<br>Write your answer in simplest form.<br><br>Please please Help me!! ​
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!