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
Illusion [34]
3 years ago
15

Find the zeros of the function: f(x) = x^2 - 4x - 21

Mathematics
1 answer:
IrinaK [193]3 years ago
5 0

Answer:

x = 7, x = -3

Step-by-step explanation:

We can find the zeros by factoring the equation using the zero product property.

x^2-4x-21 = 0

(x-7)(x+3) = 0

<u>x-7 = 0</u>

x = 7

<u>x+3 = 0</u>

x = -3

Zeros are x=7 and x= -3.

You might be interested in
PLEASE HELP ME!!!!!!!
Zepler [3.9K]
Honestly I don’t know it sorry
3 0
3 years ago
The rectangular piece of property measures 8 mi by 6 mi. find an equation for the ellipse if the path is to touch the center of
Artyom0805 [142]
The ellipse will be inscribed in the rectangle.
Because the rectangle measures 8 mi by 6 mi, the ellipse has
a = 8/2 = 4 mi (major axis)
b = 6/2 = 3 mi (minor axis)

The equation for the ellipse is
x^2/a^2 + y^2/b^2 = 1

That is
x^2/4^2 + y^2/3^2 = 1
x^2/16 + y^2/9 = 1

Answer:
x^2/16 + y^2/9 = 1

8 0
3 years ago
Read 2 more answers
Please help me
Klio2033 [76]

Answer:

The computer's initial price was $500.

Step-by-step explanation:

If you notice, at the top left of the graph, the y is 500 and the x is 0. The x-axis is also the timeline while the y-axis is the price line.

I hope this helped! :)

4 0
3 years ago
Read 2 more answers
The first- and second-year enrollment values for a technical school are shown in the table below: Enrollment at a Technical Scho
Lunna [17]

Answer:

x = 2010

Step-by-step explanation:

It is difficult separating and organizing the data.  The best I can see is that the question is asking what is the value of x to make f(x) = t(x) true.  x = 2010  is a year in which enrollment was the same, 740, in both f and t.

3 0
2 years ago
The number of users of a cell tower in a small, developing town increased by a factor of 1.5 every year from 2010 to 2019. The f
amid [387]

Answer:

2010\leq{x}\leq{2019}

Step-by-step explanation:

  • The function f(x) shows the number of cell tower users after "x" years from the year 2010.
  • Then, the dependent varible of the function f(x) are the number of cell tower users after x years from 2010, and  the independent variable of this function, "x", are the years that have passed since 2010, included 2010.
  • This means that the independent variable should take the values of the years from 2010, which represent the domain (values that x variable can take), that are all the years between 2010 and 2019 (which is the present year).
8 0
3 years ago
Read 2 more answers
Other questions:
  • Can someone please answer. There is one problem. There's a picture. Thank you!
    11·1 answer
  • I really need help with this
    12·1 answer
  • Rita has 6 cups of frosting. She plans to use 2/3 of it to decorate cakes. How many cups of frosting will rita use to decorate c
    5·1 answer
  • What are the four main ideas of physical science,
    12·1 answer
  • The owner of a bike shop sells unicycles and bicycles and keeps inventory by counting seats and wheels . one day , she counts 15
    7·1 answer
  • Let g(x) = -x2 + 4x + 2. Find and simplify g(-2).​
    14·1 answer
  • 1 1/3+2 3/4 simplified​
    12·2 answers
  • A car which originally cost $3000000 when new decreases in value by 20% during the first year. what is the value of the car at t
    9·1 answer
  • ⚠️⚠️ HELP me find the M the B and equation (Y=Mx+B) ⚠️⚠️
    11·1 answer
  • Find the missing length
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!