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
nikklg [1K]
3 years ago
8

Evaluate the function below for x=3 f(x)=2x^3-x^2-4x+9

Mathematics
2 answers:
Andrej [43]3 years ago
8 0

Answer:

Apex: 42

Step-by-step explanation:

ghhgfjfiyfbitfiutfbtftifbiifibyfibfibffibbffbififfibbfb

elixir [45]3 years ago
6 0
Hello,

f(x)=2x^3-x^2-4x+9=(((0+2)x-1)x-4)x+9

f(3)=(((0+2)*3-1)*3-4)*3+9=((2*3-1)*3-4)-3+9=(5*3-4)*3+9=11*3+9=33+9=42

or

f(3)=2*3^3-3^2-4*3+9=2*27-9-12+9=54-12=42

You might be interested in
What are the x-intercepts of the graph of the quadratic function
Svetllana [295]
  • Zero Product Property: if a × b = 0, then either a or b = 0 or both a and b = 0.

(Make sure to set f(x) to zero)

So for this equation, I will be factoring by grouping. Firstly, what two terms have a product of -5x^2 and a sum of 4x? That would be 5x and -x. Replace 4x with 5x - x: 0=5x^2+5x-x-1

Next, factor 5x^2 + 5x and -x - 1 separately. Make sure that they have the same quantity on the inside: 0=5x(x+1)-1(x+1)

Now you can rewrite the equation as: 0=(5x-1)(x+1)

Now apply zero product property to the factors to solve for x:

5x-1=0\\5x=1\\x=\frac{1}{5}\\\\x+1=0\\x=-1

<u>The x-intercepts are (1/5 ,0) and (-1,0).</u>

5 0
3 years ago
Given: sin ∅= 4/5 and cos x = -5/13 ; evaluate the following expression.<br><br> tan( ∅ - x )
Pavlova-9 [17]

By definition of tangent,

tan(θ - x) = sin(θ - x) / cos(θ - x)

Expand the sine and cosine terms using the angle sum identities,

sin(x ± y) = sin(x) cos(y) ± cos(x) sin(y)

cos(x ± y) = cos(x) cos(y) ∓ sin(x) sin(y)

from which we get

tan(θ - x) = (sin(θ) cos(x) - cos(θ) sin(x)) / (cos(θ) cos(x) + sin(θ) sin(x))

Also recall the Pythagorean identity,

cos²(x) + sin²(x) = 1

from which we have two possible values for each of cos(θ) and sin(x):

cos(θ) = ± √(1 - sin²(θ)) = ± 3/5

sin(x) = ± √(1 - cos²(x)) = ± 12/13

Since there are 2 choices each for cos(θ) and sin(x), we'll have 4 possible values of tan(θ - x) :

• cos(θ) = 3/5, sin(x) = 12/13 :

tan(θ - x) = -56/33

• cos(θ) = -3/5, sin(x) = 12/13 :

tan(θ - x) = 16/63

• cos(θ) = 3/5, sin(x) = -12/13 :

tan(θ - x) = -16/63

• cos(θ) = -3/5, sin(x) = -12/13 :

tan(θ - x) = 56/33

7 0
2 years ago
Read 2 more answers
Each leg of a 45-45-90 triangle measures 14 cm what is the length of the hypotenuse
PtichkaEL [24]

Answer:

14 square roots of 2 is correct

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
We have been trying to reach you about your car’s extended warranty.
bearhunter [10]

Answer:

has it gone expired

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Complete th addition sentences showing two ways to the sum. 5+4+2=
Darya [45]
5+4+2=11 or go like this 20-17=3×3=9+2
8 0
3 years ago
Read 2 more answers
Other questions:
  • The vertex angle of an isosceles triangle measures 42°. A base angle in the triangle has a measure given by (2x + 3)°. What is t
    13·2 answers
  • PLZZ HELP FAST
    14·2 answers
  • Can someone help me , &amp; help me understand the symbols better ? I really need help by someone who’s good at this !
    11·1 answer
  • IWhat is the slope of the line whose equation is y-4=5/2(x-2)?
    8·1 answer
  • 33 points my notes question part points submissions used use stokes' theorem to evaluate s curl f · ds. f(x, y, z) = zeyi + x co
    11·1 answer
  • What are the coordinates of vertex J of the pre-image?
    12·1 answer
  • Which transformation shows that the two given circles are similar?
    10·1 answer
  • .What is the speed of a jet plane that travels 528 meters in 4 seconds?
    7·2 answers
  • Find the hardest math problem in the world and solve it.
    5·1 answer
  • What is Logarithms ?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!