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
marin [14]
3 years ago
5

PLEASE HELP! Given the function f(x) = 3x2 − 4, what is f(-2)?

Mathematics
1 answer:
EleoNora [17]3 years ago
5 0

Answer: Variant C


Step-by-step explanation:

f(x) = 3x^2 − 4

For finding f(-2) just replace x with - 2 like this:

f(-2)=3*((-2))^2-4=3*4-4=12-4=8

You might be interested in
Explain how to use the Pythagorean Theorem to find the missing length of a right triangle.<br>​
tino4ka555 [31]

Pythagorean theorem.

a^2+b^2=c^2

This means that the square of the length of the 2 legs of a right triangle added together = the square of the length of the hypotenuses or diagonal.

If you know 2 of the values in the 3 variables a,b,c what would you do to find the missing variable value?

I will not write the exact answers to this problem. I think you can figure how to write it out yourselves.

6 0
2 years ago
Find a and b so that f(x) = x^3 + ax^2 + b will have a critical point at (2,3).
Digiron [165]

Using the critical point concept, it is found that a = -3 and b = 7.

<h3>What are the critical points of a function?</h3>
  • The critical points of a function are the values of x for which:

f^{\prime}(x) = 0

In this problem, the function is:

f(x) = x^3 + ax^2 + b

Hence, the derivative is:

f^{\prime}(x) = 3x^2 + 2ax

Then:

f^{\prime}(x) = 0

3x^2 + 2ax = 0

x(3x + 2a) = 0

x = 0

3x + 2a = 0

3x = -2a

x = -\frac{2a}{3}

Since the critical point is at x = 2, we have that:

-\frac{2a}{3} = 2

-2a = 6

2a = -6

a = -3

Then:

f(x) = x^3 - 3x^2 + b

Critical point at (2,3) means that when x = 2, y = 3, then:

3 = 2^3 - 3(2)^2 + b

8 - 12 + b = 3

b = 7

You can learn more about the critical point concept at brainly.com/question/2256078

4 0
1 year ago
Analyze prism shown, thank you.
inn [45]
A.
Faces - 8
Lateral Faces - 6

B.
Vertices - 12

C.
Edges - 18

D.
The base of the prism is a hexagon and the figure as a whole is a hexagonal prism.
6 0
3 years ago
4x + x - 3-9 + 4x = 6 ??​
Nookie1986 [14]

Answer:

x=2

Step-by-step explanation:

-------------------------

Given:

4x+x-3-9+4x=6

---------->>>>

Combine like terms.

9x-12=6

---------->>>>

Add 12 to both sides.

9x=18

---------->>>>

Divide both sides by 9.

x=2

-------------------------

Hope this is helpful.

8 0
2 years ago
Please help asap<br><br> rewrite c + 1/4c as a single term with a fractional coefficient.
My name is Ann [436]
C is same thing as 1c

1c + 1/4c

(In simple words: Adding a whole to 1/4.)
1 + 1/4 = 1 1/4 or 5/4
same thing when having c:
1c + 1/4c = 1 1/4c or 5/4 c

Answer: 1 1/4c or 5/4c
3 0
3 years ago
Other questions:
  • Someone please help me with my long division homework in return I will answer Spanish questions
    15·2 answers
  • Find the distance between (1, 4) and (3, 9). Round the answer to the nearest hundredth.
    12·1 answer
  • One inch corresponds to 8 feet on an architects blueprint. Find the actual length of a wall represented by 4 1/2 inches on the b
    8·1 answer
  • Determine the better buy. 12 oz for $2.69 or 16 oz for $2.49?
    13·2 answers
  • Joseph served 18 customers in 42 minutes. Approximately how many customers would he serve in 2 hours if he continued at this rat
    11·1 answer
  • A right circular cylinder has a base radius of 6 centimeters and a height of 12 centimeters. What is the volume of this cylinder
    9·1 answer
  • Look at the picture please.
    15·1 answer
  • Help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    14·2 answers
  • If 4m + 1 = 7 then 4m = 6
    14·1 answer
  • MARKING BRAINLEIST IF YOUR RIGHT !!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!