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
stich3 [128]
3 years ago
6

If the function f is given by f(x)=2x2−4, then which of the following represents the value of c such that f(c)=28? Select one: A

. 0 B. 2 C. 4 D. 8
Mathematics
1 answer:
Margarita [4]3 years ago
6 0

C

given f(x) = 2x² - 4 , then

f(c) = 2c² - 4 = 28 (add 4 to both sides )

2c² = 32 ( divide both sides by 2 )

c² = 16 ( take the square root ob both sides )

c = ± \sqrt{16} = ± 4

Since the answer is looking for the positive solution then c = 4


You might be interested in
A function is given by the equation h (x)=x 2 squared +6x-3. what is h (3)?
Leno4ka [110]
Your "<span>h (x)=x 2 squared +6x-3" is ambiguous.  If you meant "x squared," then you need only write x^2  OR  "x squared," but NOT "x 2 squared."

I will assume that by  "</span><span>h (x)=x 2 squared +6x-3" you actually meant:

</span><span>h(x)=x^2 +6x-3.  To find h(3), subst. 3 for x:  h(3) = (3)^2 + 6(3) - 3, or

h(3) = 9 + 18 - 3, or h(3) = 24.</span>
5 0
3 years ago
Max has 5 red model cars one third as model cars are red how many model cars does max have
const2013 [10]
So  one third means you mutilply by 3  so 3x5 is 15 model cars
6 0
3 years ago
Read 2 more answers
Write an expressions for one half of 10
Korolek [52]
10/2=5 
hope this helps
3 0
3 years ago
How do you think inequalities are different from equations you have worked with before?
dmitriy555 [2]

Answer:

Inequalities are different from equations.  If you multiply or divide both sides of an equation by the same negative number, the equation remains the same, but If you multiply or divide both sides of an inequality by the same negative number, the inequality reverses.

4 0
3 years ago
Question 2 of 10
lana66690 [7]

Answer:

O_O UHMM I think B and C.. and A

5 0
3 years ago
Read 2 more answers
Other questions:
  • If x=5, what is the perimeter of the rectangle whose length is 6x-4 and whose width is 3x+2? *
    6·1 answer
  • Anyone know the answer to question b
    11·1 answer
  • What is the answer to this equation 5X + 4 = 49
    8·2 answers
  • Exponential functions help a girl out please
    11·1 answer
  • What is the probability of rolling an odd or non-prime number using a 12-sided die?
    6·1 answer
  • If the product of x^2a-1/y^3b+4 and x^7b-4/y^10-a is x^24/y^19 find the value of a and b
    13·1 answer
  • PLEASE SOMEONE ANSWER THIS !!
    5·1 answer
  • martin reads 19 pages of a novel in 12 minutes. complete the proportion and use it to find x, the number of pages he reads in 42
    6·1 answer
  • Conditional tree diagram
    5·1 answer
  • The total length of three fence panels is 5.4 m.<br> Work out the total length of ten fence panels.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!