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
fomenos
3 years ago
7

Let f(x)=3x+5 and g(x)=x^2.

Mathematics
1 answer:
Nady [450]3 years ago
3 0

Answer:  x² + 3x + 5

<u>Step-by-step explanation:</u>

f(x) = 3x + 5       g(x) = x²

(f + g)(x) = f(x) + g(x)

             = 3x + 5 + x²

             = x² + 3x + 5

You might be interested in
Find the critical points of the surface f(x, y) = x3 - 6xy + y3 and determine their nature.​
Vedmedyk [2.9K]

Compute the gradient of f.

\nabla f(x,y) = \left\langle 3x^2 - 6y, -6x + 3y^2\right\rangle

Set this equal to the zero vector and solve for the critical points.

3x^2-6y = 0 \implies x^2 = 2y

-6x+3y^2=0 \implies y^2 = 2x \implies y = \pm\sqrt{2x}

\implies x^2 = \pm2\sqrt{2x}

\implies x^4 = 8x

\implies x^4 - 8x = 0

\implies x (x-2) (x^2 + 2x + 4) = 0

\implies x = 0 \text{ or } x-2 = 0 \text{ or } x^2 + 2x + 4 = 0

\implies x = 0 \text{ or } x = 2 \text{ or } (x+1)^2 + 3 = 0

The last case has no real solution, so we can ignore it.

Now,

x=0 \implies 0^2 = 2y \implies y=0

x=2 \implies 2^2 = 2y \implies y=2

so we have two critical points (0, 0) and (2, 2).

Compute the Hessian matrix (i.e. Jacobian of the gradient).

H(x,y) = \begin{bmatrix} 6x & -6 \\ -6 & 6y \end{bmatrix}

Check the sign of the determinant of the Hessian at each of the critical points.

\det H(0,0) = \begin{vmatrix} 0 & -6 \\ -6 & 0 \end{vmatrix} = -36 < 0

which indicates a saddle point at (0, 0);

\det H(2,2) = \begin{vmatrix} 12 & -6 \\ -6 & 12 \end{vmatrix} = 108 > 0

We also have f_{xx}(2,2) = 12 > 0, which together indicate a local minimum at (2, 2).

3 0
2 years ago
Help will give brainlest
Tatiana [17]

Answer:

The 2017  year is out of proportion.

Step-by-step explanation:

That graph should be at about half to 3/4 the height of the average heights of the other bars.

5 0
3 years ago
Need all answers for this.
nata0808 [166]

Answer:

Step-by-step explanation:

9

3 0
2 years ago
What is the product of 7 1/2 and 5 1/2
Juli2301 [7.4K]
The answer is 41.25
hope this helps
8 0
4 years ago
Read 2 more answers
The length of a rectangular room is one less than twice the width. The area of the room is 28 square feet. Find the dimensions o
Sholpan [36]

The first step to solve this problem is to represent variables for the width and the length:

Let w = width of the rectangle

      2w – 1 = length of the rectangle

The formula to compute for the area of the rectangle is:

A = LW

Substituting the values and variables to the formula:

28 = w (2w – 1)

2w^2 – w = 28

2w^2 – w – 28 = 0

Solve the quadratic equation:

(2w + 7)(w – 4) = 0

w = -7/2 or w = 4

You cannot use the -7/2 because there is no negative measurement.

W = 4 feet

L = 2(4) – 1 = 7 feet

Therefore the dimension of the rectangle is 4 feet by 7 feet.

7 0
3 years ago
Read 2 more answers
Other questions:
  • -16 = 4/3x -8 Solve please
    14·1 answer
  • Can you prove that the quadrilateral is a parallelogram based on the information? Support your response with an explanation. (4
    12·1 answer
  • 9.,..:.,;:..,;:.,;:.,,;;:,,;::.,;;,.
    9·1 answer
  • How to find out if a triangle is a right triangle
    11·1 answer
  • A student can walk to school in 3/4 of an hour. She can ride to school in 1/6 of that time. What fraction of an hour does it tak
    11·1 answer
  • A box contains two purple marbles nine orange marbles and seven yellow marbles if you pick two without looking what is the proba
    5·1 answer
  • What is the slope of the line that passes through the points (8, 2) and (9,3)? Write
    13·1 answer
  • An appliance store decreases the price of a 19 inch television set 21% to a sale price of $475.19. What was the original price
    5·1 answer
  • Find the missing angle.<br><br> 90 - 43<br><br> y = [???]
    11·1 answer
  • Write the number in two other forms (fraction, decimals, or percent 19/20 9/16 0.4 0.22
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!